A bomb attack on a Shi'ite Muslim procession has killed five mourners and wounded more than 80 in northwest Pakistan as Shi'ites mark their holiest day Ashura.

Officials say the bomb exploded on Sunday in the city of Dera Ismail Khan in Khyber Pakhtunkhwa province, where a day earlier a blast claimed by the Taliban killed eight people near a Shi'ite Muslim procession.

"Five people were killed and 83 injured in the bomb blast," Shafeerulla Khan, a senior government official in regional capital Peshawar told AFP.

Khan said preliminary investigations indicated the device was planted inside a shop but police were probing whether a suicide bomber was involved.

A spokesman for the Pakistani Taliban soon claimed responsibility for the bombing and threatened more attacks.

"It was a suicide attack and we claim responsibility for it," Ehsanullah Ehsan told AFP by telephone from an undisclosed location.

He repeated his threat made Saturday that the Taliban had dispatched more suicide bombers across the country for attacks against the minority community.