Pakistani prison officials say an early morning raid by hundreds of militants, on the Bannu prison, near the Afghan border.
The attack began at 01:30 hours, April 14, 2012.
Pakistani officials say at least 400 prisoners were freed, but some were re-captured or voluntarily gave up. Mujahideen claim 1,200 prisoners were freed. The prison is said to be able to hold nearly 1,000 people.
The attack came hours after U.S. officials told Pakistani officials that the United States would continue terror drone attacks.