At least six people are dead and 150 injured in Pakistan's central Punjab region after a Karachi-bound express train smashed into a stationary freight train.
Saima Bashir, a railway official, blamed the accident on the driver of the passenger train.
Mr Bashir said he failed to notice a red signal that went up when the goods train had stopped, after it ran over a man crossing the railway track.
Rescue officials worked in the darkness to free passengers from the wreckage.
The emergency response to the disaster was delayed due to Eid holidays.
Pakistan's rail system is notorious for its chronic disrepair and tragic accidents, due to corruption, bad management, and underinvestment.