A suicide bomb attack at a mosque within a pro-Taliban seminary in northwestern Pakistan has killed a senior cleric and five other worshippers. Dozens of other people were injured in the incident on Friday, police said. District police chief Abdul Rashid said the blast occurred at Akkora Khattak, in Khyber Pakhtunkhwa province. He said officers are investigating. No group has immediately claimed responsibility for the attack inside Jamia Haqqania, a seminary which is known for links with the Afghan Taliban.