A suicide car bombing Wednesday at a military camp in north-western Pakistan killed at least two soldiers and injured four, a security official said, dpa reported.
"Sentries on duty spotted the suicide bombers at least 100 metres from the camp" and fired shots after the car did not stop, the official said on the condition of anonymity.
It was not clear if the gunfire triggered the blast or the two attackers riding in the car detonated the explosives outside the Zarai Noor Camp, a forward operating base in Wana, the main town of the South Waziristan tribal district near the Afghan border.
Most of the casualties were soldiers on guard duty.
The attack came a day after a would-be suicide bomber blew up his explosives-laden vehicle close to a police station in Bannu, a north-western town close to the Waziristan region. The blast injured at least eight people, mostly policemen.