Image caption, At least 15 have been killed after an earthquake struck Pakistan's Balochistan province

At least 15 people have been killed after an earthquake struck Pakistan's Balochistan province early on Thursday, officials have told AFP.

Disaster management officials were quoted as saying that the death toll may increase.

Images on social media showed people in the city of Quetta out on the streets in the aftermath of the quake.

Initial reports indicated that the quake may have measured up to 5.7 on the Richter scale.