Forty people were killed and over 20 injured when a bus fell off a bridge in Pakistan's Punjab province on Sunday.

The accident occurred near Pattoki, when the bus carrying more than 60 passengers was going from Lahore to Multan, police said.

The bus caught fire after going off the bridge.

Police Officer Tariq Abbas Qureshi said 40 people were killed while state-run PTV reported that 35 had died.

Police said 22 people were injured.

Rescue worker rushed to the site of the accident to ferry the wounded to hospital.