DERA ISMAIL KHAN, Pakistan — Dozens of Taliban militants armed with guns, grenades, and bombs attacked a prison in northwest Pakistan, freeing more than 250 prisoners, including 25 ‘‘dangerous terrorists,’’ officials said.
The militants killed six policemen, six Shi’ite Muslim prisoners, and two civilians during Monday night’s attack in the town of Dera Ismail Khan, said the town’s commissioner, Mushtaq Jadoon. One of the Shi’ites was beheaded.
Fifteen policemen were wounded, said Jadoon.
Around 70 militants arrived at the prison by car and motorcycle at around 11:30 p.m. to begin the attack, which lasted for about four and a half hours until most of the fighters escaped, said intelligence officials, speaking on condition of anonymity because they were not authorized to talk to the media. Full story for BostonGlobe.com subscribers.