ISLAMABAD (AP) -- Pakistani police say a gas cylinder blast on a school bus has killed at least 17 children in eastern Pakistan.

Police officer Mohammed Rasheed says seven children were also injured Saturday when the faulty gas cylinder exploded on the outskirts of the city of Gujrat.

He says the dead and injured children were going to school at the time.

Gujrat is located about 200 kilometers (120 miles) southeast of the capital, Islamabad.