A remote-control bomb blew up a vehicle carrying paramilitary troops in a remote tribal region in northwestern Pakistan (search) on Monday, killing two soldiers and a driver, a government official said.

Nobody claimed responsibility for the blast on a dirt road on the outskirts of Miran Shah, the main town in North Waziristan (search) tribal region, and the government official Syed Zaheer-ul-Islam said they were still investigating.

He said three soldiers were also injured in the attack.

"It was a remote-control bomb which killed two soldiers, one driver, and wounded three soldiers," he said.

Islam would not say who could be behind the attack.

North Waziristan is located near South Waziristan, the scene of a major army operation against Al Qaeda (search) suspects, which ended Sunday with 72 people dead, including 17 soldiers.

Pakistan's tribal regions bordering Afghanistan, where the government has deployed about 70,000 troops, are considered a possible hideout for Usama bin Laden and his chief aide, Ayman al-Zawahri.