India, Oct. 21 -- At least 11 passengers were killed, and over 30 others sustained injuries when a speeding bus hit a divider and overturned in Pakistan's Punjab province on Wednesday, an official said.

The bus was travelling from Karachi to Punjab's Dera Ghazi Khan district when the accident occurred in Rajanpur, about 500 kilometres from Lahore.

A spokesperson for Pakistan's national emergency response service Rescue 1122 said the accident occurred on a section of the highway where construction work was underway.

The spokesperson, citing witnesses, said overspeeding was believed to have caused the accident.

"The speeding bus collided with the divider before overturning, leaving several passengers trapped and injured. Eight passenger...