Six people, including a woman and a child, were killed in the accident, they said.
The rescue team has retrieved the bodies from the river, they said, adding that the incident had occurred due to speeding.
Road accidents are common in Pakistan. Most of them are caused by careless driving, bad roads and faulty vehicles.
Nine people were killed and 29 others injured when a passenger bus collided head-on with a truck on an inter-city highway on Monday.
In December, at least 10 people, including six children, were killed when two buses and a pick-up van collided on a highway in the Sindh province.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)