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
The shadow home secretary will tell the Labour conference the Tories have pandered to anti-immigrant sentiment and set "bogus" targets.
In an open letter to Jeremy Corbyn, senior Labour figures said Labour needed to present an alternative to the Tories' "destructive Brexit".
Six people have been injured and a man has been arrested after an alleged noxious substance attack in east London.