Security forces intercepted and killed a "high-value target" of the Lashkar-e-Jhangvi (LeJ) said to be involved in the killings of over 100 members of the Shia Muslims as well as police personnel, Inter-Services Public Relations (ISPR) reported early Thursday.
Pakistan's navy says safety forces have raided a militant hideout, triggering a shootout wherein an intelligence officer and a infamous militant needed for over 100 deaths of minority Shiites have been killed together with two different suspects.
A security personnel of the Anti-Terrorism Force (ATF), who was seriously injured during Wednesday night's operation in Killi Almas area, embraced martyrdom as he succumbed to his injuries in Combined Military Hospital (CMH), Quetta, on Thursday afternoon.
Three militants were killed in the firefight that erupted, including Salman Badeni, the provincial commander of the sectarian militant group Lashkar-e-Jhangvi (LeJ).
The other two militants were suicide bombers, the military said. Sunni extremists view Shiites as apostates.
The Islamic State, which operates from the lawless border regions of Pakistan and Afghanistan, has had worked in alliance with local militants such as the LeJ in several strikes in past.
More than 1,500 Shiite Hazaras have been martyred in the province in recent years, according to Mr Abdul Khaliq Hazara, chairman of the Hazara Democratic Party.
All five attackers were killed, the army statement said, adding that the failed attempt was a response to the earlier military raid.
There was no immediate claim of responsibility.
Pakistan has also been battling separatist insurgents in Balochistan for over a decade, with hundreds of soldiers and rebels killed in the fighting.