A woman among six injured after unidentified gunmen opened fire at a passenger bus here in Sibbi on late Sunday night. According to police unidentified armed men signaled to stop a Nawabshah bound passenger bus coming from Quetta in Bakhtiarabad area. The driver did not stop and tried to flee after which armed men opened fire at passenger bus injuring six people including a women. The driver however managed to run away from the robbers who wanted to loot the passengers at gun point. The injured were later shifted to hospital where according to hospital sources condition of all the injure people was serious.