Deadly US drone pounds Waziristan
Four people have been killed in a US drone strike in north-west Pakistan, say local officials.
The plane reportedly fired missiles at a vehicle near the town of Miranshah in North Waziristan, an Afghan border haven for al-Qaeda and the Taliban.
Pakistani officials say those killed in the attacks were militants - a claim that cannot be independently confirmed.
US drone attacks in Pakistan's tribal region have escalated since US President Barack Obama took office.
There were more than 100 such raids in the tribal region last year.
The US does not routinely confirm that it has launched drone operations, but analysts say only American forces have deployed such aircraft in the region.