Taliban militants wearing police uniform have launched an assault on a prison in north-west Pakistan.
The attack on the jail in the town of Dera Ismail Khan began with several explosions at around midnight on Monday.
Gunmen then opened fire with rocket-propelled grenades and machine-guns, police chief Sohail Khalid said.
The prison houses hundreds of Taliban and militants from banned groups. The fighting is still going on.
The attackers were chanting “God is great” and “Long live the Taliban,” officials told the Associated Press.
A local resident told the agency that the initial blast was so loud that “it rattled every house in the neighbourhood”.
Pakistani Taliban spokesman Shahidullah Shahid has claimed responsibility for the attack. He said around 300 prisoners had been freed.
“The Taliban have loudspeakers and they are calling the names of their friends,” the town’s civil commissioner, Mushtaq Jadoon, said.