BALASORE, India (AP) — Rescuers found no more survivors in the overturned and mangled wreckage of two passenger trains that derailed in eastern India, killing more than 280 people and injuring hundreds in one of the country’s deadliest rail crashes in decades, officials said Saturday.

Chaotic scenes erupted after the derailment on Friday night about 220 kilometers (137 miles) southwest of Kolkata, as rescuers climbed atop the wrecked trains to break open doors and windows using cutting torches.

The death toll rose steadily throughout the night. Scores of bodies, covered by white sheets, lay on the ground near the tracks while locals and rescuers raced to free the hundreds of people trapped in the rail cars under the twisted metal and broken glass. Army soldiers and air force helicopters joined the effort.

An Associated Press photographer saw bodies still entangled in a badly mangled coach, as rescuers struggled to retrieve them working under the oppressive heat with temperatures reaching up to 35 degree Celsius (96 degrees Fahrenheit).

“By 10 pm (on Friday) we were able to rescue the survivors. After that it was about picking up dead bodies,” Sudhanshu Sarangi, director of Odisha state’s fire and emergency department, told The Associated Press. “This is very, very tragic. I have never seen anything like this in my career.”

At least 280 bodies were recovered overnight and into Saturday morning, he said. About 900 people were injured and the cause was under investigation.

The accident occurred at a time when Prime Minister Narendra Modi is focussing on the modernization of the British colonial-era railroad network in India, which has become the world’s most populous country with 1.42 billion. Despite government efforts to improve rail safety, several hundred accidents occur every year on India’s railways, the largest train network under one management in the world.

Modi flew to the crash site and spent half an hour examining the relief effort and talking to rescue officials. He was seen giving instructions on the phone to officials in New Delhi.

He later visited a hospital where he walked around inquiring from doctors about the treatment being given to the injured, and spoke to some of them, moving from bed to bed in a ward.

Amitabh Sharma, a Railroad Ministry spokesperson, said the rescue work was near completion. Rail authorities will start removing the wreckage to repair the track and resume train operations, he said.

About 200 of the severely injured people were transferred to specialty hospitals in other cities in Odisha, said PK Jena, the state’s top administrative official. Another 200 were discharged after receiving medical care and the rest were being treated in local hospitals, he added. Scores of people also showed up to donate blood.

“The challenge now is identifying the bodies. Wherever the relatives are able to provide evidence, the bodies are handed over after autopsies. If not identified, maybe we have to go for a DNA test and other protocols,” he said.

Ten to 12 coaches of one train derailed, and debris from some of the mangled coaches fell onto a nearby track, according to Sharma. The debris was hit by another passenger train coming from the opposite direction, causing up to three coaches of the second train to also derail, he added.

A third train carrying freight was also involved, the Press Trust of India reported, but there was no immediate confirmation of that from railroad authorities. PTI said some of the derailed passenger coaches hit cars from the freight train.

The rescue operation was slowed because two train cars were pressed together by the impact of the accident, Jena said.

Officials said 1,200 rescuers worked with 115 ambulances, 50 buses and 45 mobile health units through the night. Saturday was declared as a day of mourning in Odisha.