MULTAN - At least one person was killed while three others, including two cops, injured when unidentified motorcyclists let off a volley of bullets on a police picket on fertilizer factory bypass in the Seetal Mari Police precincts late the other night, police sources said. The deceased was identified as milkman Amanat Ali, a resident of Mughalpura while injured included deceaseds daughter Muqaddas, a traffic warden Shahzad and constable Naveed. The police said that the cops at the picket stopped the suspected motorcyclists, who instead opened indiscriminate fire on them. City Police Officer Amir Zulfiqar said that a special team had been constituted to arrest the killers. He added that an ASI Shaukat and constable Asghar were also suspended for demonstrating negligence and cowardly behaviour.