PESHAWAR: A US drone strike targeting a vehicle killed four militants in Pakistan's tribal belt on Tuesday, local officials said, the second such operation since the killing of Osama bin Laden.

A security official said the drones fired two missiles into South Waziristan.

Another official said the missiles fell near Angoor Adda village.

“Two missiles were fired on a vehicle at about 4:15 pm (1115 GMT) and four militants were killed,” the official told AFP on condition of anonymity.

The identity of the militants was not immediately known.

On Monday, hundreds of Taliban rallied in Wana, the main town of South Waziristan, vowing to avenge bin Laden's death after US Navy SEALs shot him dead last week in the Pakistani town of Abbottabad near Islamabad.