Islamabad (CNN) -- Two soldiers were killed early Wednesday by a pair of suicide bombers who detonated their car when they were stopped from entering an army base, Pakistan's military said.
The car exploded outside the Zarai Noor Camp, in Wana, South Waziristan, after it was signaled to a halt by soldiers, a military statement said.
"The sentries on duty spotted the suicide bomber at least 100 meters from the camp. Both suicide bombers were blown up in the explosive-laden car," it said.
Two security forces personnel were killed and four more injured by the blast.
The attack took place in Pakistan's ungoverned tribal region along the Afghanistan border, a stronghold of the Pakistan Taliban.