A girl walks past the remnants of a house in the earthquake-devastated district of Awaran on Thursday, September 26. The 7.7-magnitude quake struck on September 24 in a remote, sparsely populated area of southwestern Pakistan.
Islamabad, Pakistan (CNN) -- An earthquake in Pakistan, powerful enough to prompt the appearance of a small island off the coast, has killed at least 330 people, Pakistani officials said.
The 7.7-magnitude quake struck Tuesday in a remote, sparsely populated area of southwestern Pakistan, but it had severe consequences.
At least 330 people have lost their lives, a spokesman for the National Disaster Management Authority said Wednesday. In addition to the fatalities, 445 people were injured, he said.
And more people are still feared to be trapped in wreckage. Images from the scene showed some buildings reduced to rubble.
"Still, there are some areas that are not accessible," a spokesman for the Red Crescent told CNN.
"So that toll can be increased," Khalid Bin Majeed said about the number of deaths. "When we reach all the areas, then there will be a clear picture."
Rescue efforts are under way in the heavily hit districts of Awaran and Kech in Balochistan province. But severely damaged communications networks are hindering the operation, said Jan Muhammad Buledi, a spokesman for the provincial government.
Hundreds killed in Pakistan earthquake
Did quake cause island to appear?
Thousands of survivors from the earthquake are facing difficulties in the two districts, he added, saying that authorities have received offers of support from Iran and Turkey.
The Pakistani military has deployed more than 1,000 troops to the affected area to help with rescue and relief efforts, some of them traveling in helicopters and others in convoy on mountain roads.
About 10,000 food packs have been sent to the region. Each pack can feed a family for 15 days.
The troops are entering a difficult region. Militants fighting for a separate state in Balochistan operate out of part of Awaran district, which has been the site of bombings in the past.
The remoteness of the area means that some of the injured are having to be airlifted to major cities such as Quetta, the capital of Balochistan, and Karachi, the capital of neighboring Sindh province.
Measuring the magnitude of earthquakes
Island emerges
The quake was strong enough to cause a mass 20 to 30 feet high to emerge from the Arabian Sea like a small mountain island off the coast of Gwadar, local police official Mozzam Jah said. A large number of people gathered to view the newly formed island, he said.
Large quakes can cause significant deformation to the earth's crust, particularly visible along coastlines.
The island is about 100 feet in diameter and about one mile off the coast, GEO TV reported.
Zahid Rafi, principal seismologist for the National Seismic Monitoring Center, confirmed the island had formed. He said it was "not surprising," considering the magnitude of the earthquake.
But John Bellini, a geophysicist with the U.S. Geological Survey, said that generally it would be unlikely for a large island to emerge from such a quake as Tuesday's.
Many things, such as the tide, could come into play regarding the rise of the island, he said.
With a depth of about nine miles (about 15 kilometers), the quake struck 43 miles (69 kilometers) northeast of Awaran and 71 miles (114 kilometers) northwest of Bela, the U.S. Geological Survey said.
The tremors lasted two minutes. People flocked out onto the streets of Quetta.
Aftershocks could be felt in Karachi, hundreds of miles to the southeast.
CNN's Saima Mohsin and journalist Sophia Saifi reported from Pakistan. CNN's Mari Ramos and Elizabeth Joseph also contributed to this report.
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A Pakistani Army helicopter hovers over people as they wait for relief in Awaran on September 26.
People gather on an island on Wednesday, September 25, that appeared off the coast of Gwadar after the earthquake.
An earthquake survivor undergoes tests at a hospital in Karachi on September 25.
Survivors take shelter at a makeshift hospital in Awaran on September 25.
Volunteers load relief supplies in Karachi, Pakistan, on September 25 for earthquake-affected people of Balochistan province.
Members of Pakistan's army prepare to travel to Balochistan province from Karachi on September 25.
A woman stands in front of the rubble of her destroyed home in Balochistan province on September 25.
Pakistani relatives help an injured earthquake survivor at a hospital in Karachi on September 25. At least 330 people have died, a spokesman for the National Disaster Management Authority said Wednesday. In addition to the fatalities, 445 people were injured, he said.
People sit under a makeshift sunroof near the rubble of their destroyed homes on September 25.
People affected from earthquake stand on rubble of their destroyed homes on September 25.
Pakistani children are treated in a makeshift hospital on September 25.
People look for belongings on on September 25, amid the rubble of their destroyed homes after an earthquake.
Survivors gather around destroyed houses in the Awaran district on September 25.
People walk on an island that formed off the coastline of Gwadar after the earthquake hit in this photo released by the Pakistani government.
A family rests at a makeshift hospital in Awaran on September 25.
Members of the Pakistani Muttahida Qaumi Movement load relief supplies onto a truck in Karachi on September 25.
People clear debris off of a truck in Awaran on September 25.
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