The death toll had risen to over 280 Saturday as rescuers in eastern India continued to sift through the wreckage of one of the country’s deadliest train derailments in decades.

More than 900 people were injured after a passenger train derailed, causing between 10 and 12 cars to wreck in Odisha, about 137 miles southwest of Kolkata. Some of the debris from the crash scattered onto another track, causing at least three cars from a second passenger train to derail as well, Railroad Ministry spokesperson Amitabh Sharma said.

Local media reported a third train carrying freight was also involved in the accident.

“This is very, very tragic. I have never seen anything like this in my career,” Sudhanshu Sarangi, director of Odisha state’s fire and emergency department, told The Associated Press.

Here’s what we know about the crash and the rescue operation:

Are rescuers still searching?

Officials said they found no more survivors and they were recovering the bodies of people killed in the crash overnight.

“By 10 p.m. (on Friday) we were able to rescue the survivors. After that it was about picking up dead bodies,” Sarangi said.

About 200 of the most severely injured survivors were transported to specialty hospitals in the region, while another 200 were discharged after receiving treatment Friday night, P.K. Jena, a top official, said. Hundreds more injured people were being treated at local hospitals.

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“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.

About 1,200 rescuers worked with 115 ambulances, 50 buses and 45 mobile health units through the night, officials said. They declared Saturday a day of mourning in the state. Residents from the local village also rushed to the site to help.