"Right now the challenge for us is to quickly rescue those passengers who are still trapped in the wreckage", he said.
The spokesman said the accident happened when the Millat Express heading from Karachi to Sargodha, derailed before dawn, spilling onto a track carrying the Sir Syed Express from Rawalpindi in the opposite direction.
A spokesperson of PR added that the accident occurred after the coaches of one train, the Millat Express, derailed and fell across the opposite track, where they were hit by another train, the Sir Syed Express.
"Several people have been killed and many others trapped inside", the official said.
Umar Tufail, a senior police officer at Daharki confirmed the death toll as 30.
Expressing regret over the train accident, PPP co-chairperson Asif Zardari said that the Sindh government should take concrete steps for the rescue operation whereas the federal government should pay compensation to the families of the victims.
"This is a challenging task".
Rescue teams rushed to the scene to recover the passengers stranded in the train bogies. "We are also establishing a medical camp to provide medical aid to citizens".
Meanwhile, Prime Minister Imran Khan said that he has asked the railways minister to reach the site and ensure medical assistance to the injured and facilitate the rescue process.
He said villagers, rescuers, and police were transporting the dead and injured passengers to nearby hospitals. "Shocked by the horrific train accident at Ghotki early this morning leaving 30 passengers dead", he said.
30 people have died after two trains collided in Pakistan.
"Ordering comprehensive investigation into railway safety faultlines", his official Twitter account said.
Authorities fear that the number of fatalities in the accident could rise.
Photo taken with mobile phone shows people gather near derailed compartments of a passenger train in Ghotki district of Pakistan's southern Sindh province on June 7, 2021.
In a rare and one of the most horrifying tragedies in PR's history, 74 passengers were killed, with 90 per cent of them burnt alive, and over 40 injured when three coaches of the Rawalpindi-bound Tezgam Express caught fire near Rahim Yar Khan on October 31, 2019.