A US drone strike in South Waziristan on Sunday missed its target -- a suspected militant vehicle-- allowing rebels to flee, local security officials said. The missile strike took place in Azam Warsak town, 20 kilometres (12 miles) west of Wana, the main town of the South Waziristan tribal district. "US drones first fired two missiles targeting a suspected militant vehicle but they failed to hit, allowing rebels, who were said to be over four in number, to run away," a senior security official said. He said that two more missiles fired from a drone hit the vehicle but failed to destroy it.