Chief security officer of President Asif Ali Zardari was attacked by unknown armed assailants late Saturday in the limits of Gulbahar police station, Geo News reported. The armed men attacked Bilal Shaikh in 'Firdous' Colony. The assailants fled the scene after bodyguards of Bilal retaliated, leaving behind their car and weapons. Two bodyguards of Bilal Shaikh were injured in the incident. Police have seized the vehicle and weapons. Talking to Geo News, Bilal Shaikh said he had been receiving death threats for sometime.