Attackers fled the scene after opening fire on paramilitary patrol.
Unidentified gunmen on Friday opened fire on a paramilitary patrol in Quetta, killing three soldiers before fleeing the scene, officials said.
The soldiers from the Frontier Corps were hit in the head while patrolling on foot in Sabzal, a neighborhood in west Quetta, capital of Balochistan province.
“Two of them died on the spot while the third succumbed to his injuries in hospital,” said Khan Wasay, a spokesman for the Frontier Corps.
Wasay said the motive for the attack was unclear, but Quetta was already on alert for the month of Muharram.
Abdul Razzaq Cheema, a senior police official, in Quetta confirmed the attack and casualties.
No group has yet claimed responsibility but Baloch separatists demanding greater autonomy have been waging an insurgency for years, and the province is also riven by sectarian strife and Islamist violence.
Separately, four people including a soldier from the Frontier Corps were wounded on Friday after intercepting a suicide bomber on the Pakistan-Afghanistan border in the Kurram tribal district.
Security officials said the bomber was trying to cross into Pakistan at the Kharlachi Gate, but “his attempt to create a big disaster was successfully foiled.”