PADANG, Indonesia - A powerful earthquake that struck western Indonesia trapped thousands of people under collapsed buildings - including hospitals, a hotel and a classroom, officials said. At least 200 bodies were found in one coastal city and the toll was expected to be far higher.
The temblor Wednesday started fires, severed roads and cut off power and communications to Padang, a coastal city of 900,000 on Sumatra island. Thousands fled in panic, fearing a tsunami.
The undersea quake of 7.6 magnitude was followed by a powerful, shallow inland earthquake this morning with a preliminary magnitude of 6.8, the U.S. Geological Survey said. It hit about 150 miles south of Padang at a depth of just under 20 miles.
Shallow, inland earthquakes generally are more destructive, but there were no immediate reports of damage or injures.
On Wednesday, buildings had swayed hundreds of miles away in neighboring Malaysia and Singapore.
In Padang, the capital of West Sumatra province, the shaking was so intense that people crouched or sat on the street to avoid falling. Children screamed as an exodus of thousands tried to get away from the coast in cars and motorbikes, honking horns.
At least 500 buildings in Padang collapsed or were badly damaged, said Disaster Management Agency spokesman Priyadi Kardono, adding that 200 bodies had been pulled from the rubble there. The extent of damage in surrounding areas was still unclear due to poor communications, he said.
Padang's mayor appealed for assistance on Indonesian radio station el-Shinta.
"We are overwhelmed with victims and ... lack of clean water, electricity and telecommunications," Mayor Fauzi Bahar said. "We really need help. We call on people to come to Padang to evacuate bodies and help the injured."
Hundreds of people were trapped under collapsed buildings in Padang alone, including a four-star hotel, he said. Other collapsed or seriously damaged buildings included hospitals, mosques, a school and a mall.
Thousands were believed trapped throughout the province, said Rustam Pakaya, head of the Health Ministry's crisis center.
"This is a high-scale disaster," Health Minister Siti Fadilah Supari told Metro TV.
Indonesian broadcaster TVOne showed footage of heavy equipment breaking through laters of a flattened 3-story cement building, where dozens or children had been taking classes. It said more than 30 children were missing and feared dead, but gave no source for the information.
Wednesday's quake struck just off the coast of Padang, the U.S. Geological Survey reported. It occurred a day after a killer tsunami hit islands in the South Pacific and was along the same fault line that spawned the 2004 Asian tsunami that killed 230,000 people in a dozen nations.
A tsunami warning was issued Wednesday for countries along the Indian Ocean, but was lifted after about an hour; there were no reports of giant waves.
The shaking in Padang felled trees and crushed cars. A foot could be seen sticking out from one pile of rubble. At daybreak, residents used their bare hands to search for survivors, pulling at the wreckage and tossing it away piece by piece.
"People ran to high ground. Houses and buildings were badly damaged," said Kasmiati, who lives on the coast near the quake's epicenter.
"I was outside, so I am safe, but my children at home were injured," she said before her cell phone went dead. Like many Indonesians, she uses one name.
The loss of telephone service deepened the worries of those outside the stricken area.
"I want to know what happened to my sister and her husband," said Fitra Jaya, who owns a house in downtown Padang and was in Jakarta when the quake hit. "I tried to call my family there, but I could not reach anyone at all."
Hospitals struggled to treat the injured as their relatives hovered nearby.
Indonesia's government announced $10 million in emergency response aid and medical teams and military planes were being dispatched to set up field hospitals and distribute tents, medicine and food rations. Members of the Cabinet were preparing for the possibility of thousands of deaths.
Local television reported more than two dozen landslides in the province. Some blocked roads, causing miles-long traffic jams of cars and trucks.
On Tuesday, a powerful earthquake off the South Pacific islands of Samoa, American Samoa and Tonga - thousands of miles (kilometers) from Indonesia - spawned tsunami that killed more than 100 people. Experts said the seismic events were not related.
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Associated Press writers Ali Kotarumalos and Niniek Karmini contributed to this report.