KARACHI, Pakistan (AP) _ A passenger train derailed in southern Sindh province on Tuesday, killing at least 15 people and injuring more than 200, ambulance workers said.

The Kushal Khan Express was heading to the southern port city of Karachi from the northern border city of Peshawar. At least six railway cars derailed near Kotri, 105 miles from its destination, they said.

At least eight bodies have been taken out of a demolished railway car, while many more are still trapped, Edhi Ambulance Service officials said.

The cause of the accident was not immediately known. Railway authorities said they have begun an inquiry.

Pakistan's train system is antiquated and dozens of accidents have killed nearly 2,000 people in the last decade. The deadliest crash was in 1989, when two passenger trains slammed into each other also in Sindh province, killing 850 people.

The last major train accident was in March 1997 when 126 people were killed in eastern Punjab province.