Dhaka, Sept. 30 -- At least eight people were killed and several others injured when militants detonated a powerful car bomb outside the headquarters of Pakistan's paramilitary security forces in Quetta on Tuesday, officials said.

Police said four attackers exited the vehicle before the blast and engaged security personnel in a fierce gunfight. All four were later killed by returning fire from the troops, Balochistan Chief Minister Sarfraz Bugti said.

Residents described the explosion as massive, audible from miles away. Ambulances rushed to the site in front of the Frontier Constabulary, and the wounded were taken to nearby hospitals. CCTV footage showed the car stopping at the gate of the compound, followed by an explosion and gunfire...