Fifteen passengers were killed and 40 other injured after Hazara Express derailed at Sarhari railway station in Nawabshah on Sunday.
According to the initial reports, around 7 to 8 bogies have derailed and overturned.
The Hazara express was heading toward Havelian from Karachi.
Injured persons have been shifted to nearby hospitals while rescue teams were busy evacuating stranded passengers.
Meanwhile, Pakistan Army and Rangers have started relief and rescue activities in Nawabshah where bogies of Hazara Express were derailed at Sarhari Railway Station.
The rescue operation has been started on the special directives of Chief of Army Staff General Syed Asim Munir.
Rescue teams of Pakistan Army and Rangers have started reaching the accident site.
Additional troops have been called in from Hyderabad and Sakrand.
Army Aviation helicopters are also reaching the spot to rescue the injured people.
Officials of Pakistan Army and Rangers are delivering food items at the accident site.
The rescue operation will continue till the transfer of the last injured to the hospital and rehabilitation of the people trapped at the accident site.
