The bus was traveling on the motorway M2 from Islamabad to Lahore when the brakes failed and the driver lost control.

The bus ploughed through the maiden dividing the two tracks of the motorway and hit two cars and a mini truck on the opposite side. It dragged the smaller vehicles to a ravine next to the road.

The bus was carrying at least 86 people from the same extended family. They were traveling to Lahore as part of a wedding party. None of them could escape the bus before it ended up in the ravine.

Kallar Kahar is in the Chakwal district. Motorway police, local people and Rescue 1122 responded to the crash.

They moved the bodies and the dead to Kalllar Kahar Trauma Center and Chakwal hospitals.

The rescuers had to cut through the bus wreckage to rescue three trapped passengers.

Prime Minister Shehbaz Sharif and Caretaker Chief Minister of Punjab Mohsin Naqvi have expressed grief over the tragic incident.

Kallar Kahar has the most accident prone section of the motorway M2 due to its hilly terrain.