The NTSB says a broken rail led to the train's derailment, which caused the bridge to partially collapse onto I-25, killing a truck driver and necessitating the highway’s closure.

Cleanup efforts continue following the June 24 derailment that sent 10 rail cars of toxic materials into the Yellowstone River.

Federal lawsuit seeks seeks penalties and injunctive relief for unlawful discharge of pollutants under the U.S. Clean Water Act, related to Feb. 3 accident rhat toppled 38 cars carrying hazardous chemicals

March 14 civil lawsuit alleges railroad violated hazardous waste and water quality laws and failed to take proper care to prevent toxic spill in East Palestine.