A government official says a suicide car bomber has attacked a security checkpoint in northwestern Pakistan and casualties are feared.
Mohammad Azhar says the attacker rammed his vehicle into the checkpoint at the entrance of army headquarters in North Waziristan on Saturday and detonated his explosives.
North Waziristan is one of Pakistan's turbulent tribal areas located near the Afghan border and is believed to be an important base for al-Qaida and Taliban militants.
Intelligence officials and residents say a suspected U.S. drone fired two missiles at an alleged militant hide-out in the tribal area on Saturday, killing 13 people.
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