Shahab Ali Shah, the senior administrative official from South Waziristan tribal region, said five people had been injured on Sunday.

"It was a drone attack," he said.

Haji Gul Zaman, who lives outside Zari Noor, said he heard two blasts and saw plumes of smoke rising from the area.

Lorries carrying pro-Taliban fighters raced towards the scene, he said.

Residents said the attack flattened the compound, while a vehicle parked nearby was also destroyed.

Drone warning

Hakimullah Mehsud, a pro-Taliban commander, vowed earlier this month to carry out two suicide attacks a week until the drone attacks stop and Pakistani troops withdraw from the region along the border with Afghanistan.

Saturday's attack on the military convoy was claimed by Hakimullah Mehsud in a telephone call to The Associated Press news agency.

"We are meeting our pledge ... We will intensify our attacks if the drone strikes in the tribal areas do not stop," he said.

About 350 people are thought to have died in an estimated 35 suspected US drone attacks, according to reports from Pakistani officials and witnesses.

The US does not confirm the drone attacks, but its forces in neighbouring Afghanistan and the Central Intelligence Agency (CIA) are known to use the unmanned aircraft.

Pakistan has repeatedly voiced its objections to the attacks, saying they violate the country's sovereignty and fuel anti-government sentiment.