At least 18 people were killed and 30 others injured on Monday in a road accident in Pakistan's Sindh province, police said.

The victims, residents of Hyderabad city, were returning from Sakrand, reports Dawn online. 

On their way back, the driver had stopped the bus to change the tyre when a trailer rammed into the stationary vehicle.

According to rescue teams, of the 30 injured, six were in critical condition. 

Cranes are being used to lift the wreck as rescue officials fear that there could be more people trapped underneath it.