(KUNA) -- Six tribesmen were killed and eight others injured in a suicide bombing in north Baghdad, the Iraqi police said here Monday. The bombing explosion took place at a checkpoint near a fuel station at Balad, 80 kilometers north of Baghdad, an Iraqi police source told Kuwait News Agency (KUNA) by phone. The suicide bomber exploded the car as soon as he approached the checkpoint, which belonged to a local council formed of chief tribesmen to work with Iraqi security forces to fight Al-Qaeda militants in Salaheddin Province, the source added.Earlier last month, Sheikh Muawia Abdullah al-Jabarah, chief of the council, was killed in a bomb explosion targeting his convoy at Balad in Salaheddin Province. Al-Jabarah, together with several other chief tribesmen, set up so-called supporting and awakening councils with a view to helping Iraqi security forces in the fight against Al-Qaeda network in the province. These councils have been under terrorist attacks by Al-Qaeda for several months due to their support to Iraqi and multinational forces.