NEW : It was the second day attackers have targeted Shiite pilgrims taking part in an annual march to one of the Shiites ' holiest shrines . Kirkuk authorities ban car , foot traffic till last week 7 a.m. . NEW : Kirkuk security forces find , destroy bomb in parked car after Kirkuk attack . Triple suicide attack in Kirkuk claims more Iraqi pilgrims , officials say . Kirkuk bomber detonates device at rally before gunmen open fire on crowd .
NEW : Kirkuk authorities ban car , foot traffic till last week 7 a.m. . NEW : Kirkuk security forces find , destroy bomb in parked car after Kirkuk attack . Triple suicide attack in Kirkuk claims more Iraqi pilgrims , officials say . Kirkuk bomber detonates device at rally before gunmen open fire on crowd .