At least four suspected terrorists were killed in Quetta’s Hazar Ganji area on Thursday night in an exchange of fire with security forces.

“Security forces conducted a raid on a compound in the Hazar Ganji area of Quetta,” said a police official.

The security official added that the terrorists fired upon the security forces, after which the forces retaliated.

Three security officials were injured after the terrorists lobbed a hand grenade, said the police official.

More security personnel were summoned to the area and a cordon was established.

Earlier this week, heavily-armed militants wearing suicide vests stormed a police academy in Quetta, killing at least 61 people and wounding at least 117, Balochistan Home Minister Mir Sarfaraz Bugti said Tuesday, in the deadliest attack on a security installation in the country's history.

Three gunmen burst into the sprawling academy, targeting sleeping quarters home to some 700 recruits, and sent terrified young men aged between 15 and 25 fleeing.

Communication intercepts showed the attack was carried out by Al-Alimi faction of the Lashkar-i-Jhangvi (LJ) militant group, IG Frontier Corps (FC) Major General Sher Afgan said.