At least 33 people were killed in a serious train accident in southern Pakistan.
At least 60 others were injured, said the railway minister Azam Swati on Monday in the capital Islamabad.
According to this, a train coming from the port city of Karachi derailed in the early morning (local time) in Sindh province.
A second train collided head-on shortly afterwards.
According to a spokesman for the railway, the rescue teams took the injured to nearby hospitals for treatment.
It was feared that the death rate would continue to rise.
Several passengers are in critical condition, the spokesman said.
Both tracks were closed after the accident.
The recovery of corpses and injured people from the rubble was still in progress in the late morning (local time).
According to the railway spokesman, around 25 passengers were still trapped in wreckage.
Heavy equipment would be used to rescue the victims.
The cause of the accident is still unclear
Local media reported that it took a few hours for rescue workers to reach the scene of the accident.
The Pakistani army sent troops, two helicopters, doctors and paramedics to support the rescue and relief efforts, the military announced.
Pakistani Prime Minister Imran Khan said he was "shocked" by the accident.
He ordered investigations into the safety of the railways.
According to Information Minister Fawad Hussain, investigations are ongoing to determine whether the cause of the accident was a "terrorist act" or human or technical failure.
Fatal train accidents are not uncommon in Pakistan. The tracks were laid under British colonial rule around a century ago and have hardly been renewed since then. Aside from obsolete tracks, bomb attacks by Islamists and separatists and generally weak security measures have been the cause of hundreds of deaths in train accidents in the South Asian country in the past.