Workers continue rescue and recovery operations 12 days after the Rana Plaza building collapsed, in Savar, Dhaka, Bangladesh on Tuesday, May 7, 2013. More than 700 people died when the Rana Plaza, which housed garment factories and shops, collapsed on April 24. Workers continue to find bodies, many of them decomposed and difficult to recognize.
Rescue workers recover a body from the rubble on May 7, 2013.
Relatives place a body in the back of a truck on May 7, 2013.
A woman attempts to identify one of the bodies kept in a schoolyard on May 7, 2013.
Members of the Bangladeshi army and firefighters carry the body of a garment worker from the scene of the building collapse in Savar, outside Dhaka, on Sunday, May 5.
A woman holds a portrait of her missing relative as she sleeps on Saturday, May 4.
Relatives attempt to identify the bodies of loved ones on May 4.
Rescue workers dig out debris from the Rana Plaza building as Bangladeshi army personnel continue the second phase of a rescue operation using heavy equipment on Friday, May 3.
A woman reacts on May 3 after identifying a body found in the rubble.
A man stands amid the destruction as rescue and army personnel continue recovery operations on May 3.
A woman holds up a picture of a missing person believed to be trapped in the rubble on May 3.
A garment worker rescued from the wreckage of the Rana Plaza building lies in a hospital in Dhaka on Thursday, May 2.
A woman weeps after identifying her daughter's body in the rubble in Savar on May 2.
Rescue workers move debris as Bangladeshi army personnel continue the second phase of a rescue operation at the site of the collapsed building in Savar on May 2.
A woman mourns before a mass burial in Dhaka on Wednesday, May 1.
Unidentified bodies from the rubble lie on the ground as people gather for a mass burial in Dhaka on May 1.
Workers dig graves during a mass burial of unidentified garment workers on May 1.
Sohel Rana, owner of the collapsed Rana Plaza building, wears police-issued body armor and a helmet while being escorted to court in Dhaka on Tuesday, April 30. Rana was arrested near the Indian border, and protesters called for him to be hanged.
Bangladeshi troops carry the body of a garment worker out of the rubble of the collapsed Rana Plaza building in Savar on April 30.
Clothing with Joe Fresh labels lies in the debris on April 30.
Cranes operated by Bangladeshi army personnel work on Monday, April 29.
Firefighters try to control a blaze that started while they were trying to rescue a woman with heavy equipment on April 29.
Bangladeshi army personnel begin the second phase of the rescue operation using heavy equipment on April 29.
Rescuers look for survivors on Sunday, April 28. The Bangladesh Red Crescent Society says the chances of finding anyone alive in the rubble at this date are remote.
A woman mourns on April 28 at the site of the building collapse in Savar.
Rescue workers search for survivors on April 28.
Volunteers sleep before they begin more rescue operations on April 28.
Rescue workers carry a victim's body recovered from the rubble on April 28.
Clothes lie in the rubble on Saturday, April 27.
An arrested owner of a garment factory is escorted to an appearance at the court in Dhaka on April 27. Four people were arrested and four others are being questioned by police.
Relatives hold photos of missing and dead workers outside the factory April 27.
Two Bangladeshi women look at a board with notices posted of missing and dead workers on April 27.
Bangladeshi relatives and workers load a body onto a truck on April 27.
An excavator operated by the Bangladeshi Army removes debris on April 26.
Volunteers and rescue workers conduct rescue operations on April 26.
Rescue workers use textile as a slide to move bodies out of the rubble on April 26.
Rescue workers look for trapped garment workers on April 26.
Rescue workers stand on the rubble of the collapsed building on April 26.
Rescue workers search the rubble for victims and survivors on April 26.
A rescue worker looks for trapped workers on April 26.
Bangladeshi army personnel recover a survivor from rubble on April 26, 48 hours after the collapse.
Volunteers and rescue workers assist in rescue operations on April 26.
A physician assists a survivor after he was recovered from the rubble on April 26.
People rescue garment workers trapped at a building outside Dhaka, Bangladesh, on Thursday, April 25.
A Bangladeshi woman shows a picture of her missing daughter-in-law she believes is trapped in the collapsed building on April 25.
Bangladeshi firefighters cut a hole through concrete during rescue operations on April 25 in Savar, a suburb of Dhaka.
Volunteers and rescue workers work at the scene on April 25.
A woman appears devastated on April 25 after identifying the body of her husband killed in the building collapse.
Bangladeshi garment workers help evacuate a survivor by using a roll of fabric on April 24.
People rescue garment workers on Wednesday, April 24, after the building caved in, leaving a chaotic mass of broken concrete and twisted metal.
Relatives who lost a brother mourn outside a hospital on April 24.
Rescuers help an injured garment worker to escape from the Rana Plaza building on the outskirts of Dhaka on April 24.
Civilians help an injured garment worker on April 24. Work was proceeding slowly to avoid causing further collapse, an official said.
Rescue workers search for trapped garment workers in the Rana Plaza building on April 24.
An injured Bangladeshi lies on the hospital floor on April 24.
The injured receive treatment at a hospital on April 24.
An injured person rests in a hospital bed on April 24.
People wait anxiously on April 24 while rescuers search for survivors.
Rescuers help an injured person out of the seventh floor on April 24.
Civilians help out in rescue efforts at the collapsed building on April 24.
Hundreds watch the rescue operations on April 24.
People search for garment workers trapped under the debris on April 24.
Rescuers help an injured worker on April 24.
A body is trapped under the damaged building on April 24.
A woman is carried away from the building on April 24.
A rescue worker carries a worker to an ambulance on April 24.
Crowds gather around the collapsed building on April 24.
Rescuers bring out an injured garment worker from the building's sixth floor.
Photos: Building collapses in Bangladesh
Photos: Building collapses in Bangladesh
Photos: Building collapses in Bangladesh
Photos: Building collapses in Bangladesh
Building collapses in Bangladesh
Photos: Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
Building collapses in Bangladesh
STORY HIGHLIGHTS
- NEW: Hospitals treat more than 1,000 people injured in the building collapse
- NEW: Rescue work continues; it is unclear how many people are trapped
- NEW: Workers say cracks appeared in the building Tuesday
- NEW: One witness says he heard people screaming inside the building
Dhaka, Bangladesh (CNN) -- An eight-story building collapsed Wednesday on the outskirts of the Bangladeshi capital, killing at least 123 people and injuring more than 1,000, officials said.
Broken concrete and twisted metal stuck out from the massive pile of rubble, where rescuers dug by hand to reach trapped workers. Dhaka District Police Chief Habibur Rahman said search efforts were continuing Wednesday night. It was unclear how many people were trapped in the ruins, he said, and the death toll could increase.
Video from the scene showed injured victims being whisked away on stretchers and crews carrying limp bodies from the rubble. Some onlookers wept while others frantically searched for missing loved ones.
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Abdul Alim said he heard people screaming inside the building and tried to help them.
"But ... we couldn't make our way to get in," said Alim, a day laborer who was one of the thousands of onlookers who tried to reach trapped victims before military, fire and civil defense rescuers arrived at the scene.
Authorities said they had not yet determined what caused the collapse of the building, where five garment manufacturers employing about 2,500 workers were based, according to the Bangladesh Garments Manufacturers and Exporters Association.
Several garment workers near the wreckage said a crack appeared Tuesday on the building's seventh floor.
At first, the workers said, managers ordered workers not to report to work on Wednesday.
Later, the factory owners reversed the order, telling workers that the building was safe, said Marjina Begum, who worked on the sixth floor. Many workers were hesitant to show up Wednesday but reported to work because they were afraid of losing their jobs, she said. More than a dozen other workers corroborated her story.
Managers for the garment manufacturers housed inside the building could not be immediately reached for comment.
M. Atiqul Islam, president of the garment manufacturers association, told reporters Wednesday evening that owners kept the factories open after the building's owner assured them that there would be no problems with the cracks that appeared on Tuesday.
Employees of the Savar branch of BRAC Bank were evacuated Tuesday after the crack was detected and were ordered not to show up on Wednesday, according to the national news agency, Bangladesh Sangbad Sangstha, citing a news statement from the bank.
None of the bank's workers was among the injured or dead, it said.
In addition, a general strike had shut a shopping mall on the two lowest floors.
The third floor of the building was offices, garment manufacturers were on the fourth through seventh floors, and the top floor was a canteen.
Bangladesh Home Minister Muhiuddin Khan Alamgir said military troops, fire service personnel and police had been mobilized to the site, about 25 kilometers (15 1/2 miles) from Dhaka.
"The fact is, we don't know yet how many people were killed actually ... but I can tell you the building was not built in compliance with the (safety) rules and regulations," Alamgir said.
"Stern legal actions will be taken against the people who built the structure defying the codes or laws."
Local police said the building's owner had gone into hiding.
A neighboring three-story building also collapsed as part of the eight-story building fell on it, police said.
Rescue work was proceeding slowly to avoid causing a further collapse, said Maj. Gen. Abul Hassan Sarwardy, commander of the army's Savar-based 9th Division.
Hospitals in Savar and Dhaka treated more than 1,000 people who were rescued from the collapsed buildings, officials said.
Video showed two female garment workers pleading to be rescued. "Please retrieve us. ... Save my life," said a woman who identified herself as Sakhina.
A doctor at Enam Hospital said some victims had lost their hands, arms or legs.
A national day of mourning was set for Thursday.
The building housed several garment makers -- including New Wave Style, Ether Tex, Canton Tech Apparel and New Wave Bottoms. The contractors appeal to cost-conscious merchants because of the low wages they can pay Bangladeshi workers.
It was not immediately clear which retailers were doing business with the factories.
A supplier to British retailer Primark was located on the second floor of the building.
"The company is shocked and deeply saddened by this appalling incident at Savar, near Dhaka, and expresses its condolences to all of those involved," Primark said in a statement.
"Primark has been engaged for several years with NGOs and other retailers to review the Bangladeshi industry's approach to factory standards," it said. "Primark will push for this review to also include building integrity."
The last major building collapse in the country occurred in 2005, when more than 70 people were killed in a garment factory collapse in the same area, the Bangladesh Sangbad Sangstha news service reported.
A fire at a clothing factory in a suburb of Dhaka in November killed at least 112 people.
Garments account for 80% of Bangladesh's $24 billion of exports.
The country has about 4,500 garment factories where workers make clothes for brands including Tesco, Walmart, JC Penney, Kohl's and Carrefour.
Scott Nova, executive director of the Worker Rights Consortium, said the disasters keep happening because companies put pressure on factories to lower prices, which results in substandard safety conditions.
"The worse the dangers get, the more business comes in, so the government has no incentive to fix anything," Nova said. "We ask ourselves every day what it's going to take to fix this."
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CNN's Samira Said and Sumnima Udas and CNNMoney's Emily Jane Fox contributed to this report.