The Pakistani Taliban mounted an attack on a jail in the northwestern city of Dera Ismail Khan that resulted in the escape of as many as 250 prisoners, media outlets said Tuesday.

Six of the 30 insurgent inmates who fled the jail during the assault have been recaptured, police inspector Mushtaq Jadoon told Geo TV.

Authorities imposed a curfew in the area and the army sent troops to help contain the situation.

The attackers, whose number has not been specified by the authorities, began their operation shortly before midnight Monday with a series of powerful explosions followed by an intense firefight.

The main Taliban group, the TTP, claimed responsibility for the jailbreak.

Around 100 fighters took part, TTP spokesman Shahidula Shahid told Dawn newspaper.

The Dera Ismail Khan prison, a building dating from the British colonial era, houses about 5,000 prisoners, including around 50 Taliban commanders, according to intelligence sources cited by Dawn.

The town where the attack occurred is located in the southern part of the northwestern province of Khyber-Pakhtunkhwa very close to the South Waziristan tribal zone, which despite the activities of the Pakistani army continues to be one of the TTP's bastions. EFE