A collision involving two passenger trains in southern Pakistan has killed at least 40 people and injured dozens.
A train travelling in Sindh province derailed and landed on another track, officials said. A second train packed with passengers then collided with it and overturned.
Rescue teams took the injured to nearby hospitals and it is thought that several are in a critical condition.
Pakistan has seen a string of deadly train accidents over the past years.
Between 2013 and 2019, 150 people died in such incidents, according to local media reports.
The accident in Ghotki district happened early on Monday when the Millat Express coming from Karachi derailed, falling on to another track. It is not clear what caused the derailment.
The Sir Syed Express coming from Rawalpindi collided with it and overturned.
Specialist equipment has been brought in to help to rescue those trapped in the tangled wreckage.
A senior official in the Ghotki district, Usman Abdullah, told Reuters news agency it was hard to know how many people were still trapped in the train.
“There are about six to eight bogies [carriages] that are totally smashed… there is a sleeper train, AC [air conditioned] class, as well as economy class, in which there were between 47 to 50 people on this side and around 50 to 60 people on the other train,” he said.
Prime Minister Imran Khan said he was “shocked” by the accident and promised a full inquiry.