Authorities are investigating the death of a BNSF Railway conductor who was hit by a passing train, the NTSB said.
According to the MTA, there was a decoupling between the third and fourth car of a No. 4 train, meaning the cars separated.
A subway train came apart in transit Sunday in the Bronx, suspending some service on the 4 and 5 lines but resulting in no injuries, MTA officials said.