The men who were on the bus were able to escape before flames engulfed the vehicle. The bride and the groom remained unharmed as they were travelling in a separate vehicle.
At least 11 people, including seven women and three children, were killed and 34 others injured in the accident, Dawn reported.
Thirty two people are critically injured and being treated for burns in various hospitals in the area.
Two people with minor injuries are being treated at the Khairpur Nathan Shah Hospital.
Those who were critically injured had to be shifted to other hospitals.
In January, a fatal bus accident claimed the lives of at least 62 people when the bus caught fire after an oil tanker collided with it off the National Highway in Malir.
PTI