At least two security personnel were killed and three injured in an explosion in Balochistan's Gwadar district on Saturday.
Coast Guard personnel were patrolling when their vehicle hit a landmine in Jewni area of Gwadar, Dawn online quoted police as saying.
Two security personnel were killed on the spot whereas three sustained serious injuries, the police said. The injured were rushed to nearby hospital.
The blast also damaged the security forces' vehicle. The area was cordoned off and a probe have been initiated into the attack.
There was no immediate claim of responsibility for the attack.
Militants in the area have been targeting security personnel and politicians for last more than a decade.
In a separate incident in Dera Murad Jamali, security forces claimed to have foiled a major bid of terrorism by seizing weapons and arresting a suspected militant.
Security sources said one suspected militant was arrested and weapons were recovered in Naseerabad district.
Balochistan, the largest province of the country by area, is home to a low - level insurgency by ethnic Baloch separatists.
Al Qaeda - linked and sectarian militants also operate in the region.