Gunmen battled Pakistani security forces for control of a major prison holding hundreds of militants on Monday night, police said.
The gunmen launched their attack with a series of heavy explosions before firing rocket propelled grenades and machine guns, district police chief Sohail Khalid said.
The prison, in the central town of Dera Ismail Khan, houses Taliban and militants from banned sectarian groups.
More top news
Labour leadership contender Owen Smith has called his rival Jeremy Corbyn a "lunatic" at a rally.
A 6.2 magnitude earthquake has left at least 10 people dead and caused destruction in central Italy.
Airstrikes were launched into Syria and tanks reportedly sent in as Turkey targets militants threatening its border.