At least six people were killed and 20 injured when a passenger train collided with a freight train in Pakistan's southern port city of Karachi Tuesday, media reports said.
The collision derailed a coach where dozens of passengers were believed to be trapped.
A rescue worker from private Chippa emergency service told Duniya television that six to seven bodies had been recovered from the damaged carriage, and up to 15 people or bodies were still inside.
"A parcel train had just left the Juma Goth station when Allama Iqbal Express heading towards Karachi slammed into it," Pakistan Railway's spokesman Shahid Aslam said.
"However, it was not a high-speed crash."
Aslam did not give any casualty figures but said that according to initial reports some people were injured.