At least 40 dead after 2 passenger trains collide in Pakistan

June 7 (UPI) -- Two express trains collided in southern Pakistan on Monday, killing at least 40 people and injuring dozens, authorities said.

The collusion occurred when a Millat Express train from Karachi to Sargodha derailed in Ghotki and hit a Sir Syed Express train headed to Karachi. Ghotki is located about 330 miles northeast of Karachi.

On Twitter, Pakistani President Arif Alvi expressed "regret" and "deep sorrow and grief over the loss of precious lives."

Prime Minister Imran Khan said he was "shocked by the horrific train accident."

"Have asked Railway Minister to reach site & ensure medical assistance to injured & support for families of the dead," he tweeted. "Ordering comprehensive investigation into railway safety."

The Pakistan Army, paramilitary Rangers, Inter-Services Public Relations, Urban Search and Rescue, and Rescue 1122 teams from Rahim Yar Khan aided in the rescue efforts.

Pakistan's military set up a relief camp to provide first aid and food to surviving passengers.