A suicide attacker on a motorcycle targeted a military truck with a bomb, killing at least 15 people in the Pakistani city of Quetta on Saturday. An explosives expert told AP that the attacker had been carrying 25kg of “incendiary explosives” on a motorcycle that he rammed into the military truck.

Baluchistan provincial Home Minister Sarfraz Bugti said that the explosion hit as a paramilitary patrol passed by on the road, adding the patrol may have been the target.

“According to the information we have received so far, there are around 15 casualties, people who were martyred, and around 40 people were wounded,” Bugti said.

Pakistan’s army press wing said there were at least seven civilians among the 15 killed.

A state of emergency has been imposed in the city, with all hospitals on alert.

Middle East-based Islamic State claimed the attack shortly afterwards, saying it had killed 17 soldiers, Reuters reported.