KARACHI: Pakistan People’s Party Chairman Bilawal Bhutto on Wednesday said the PPP government won’t spare the culprits involved in the brutal killing of famous qawwal Amjad Sabri. Condemning the daylight murder of the qawwali maestro in an ambush in Karachi, Bilawal termed it an open challenge to the law and order and writ of the state and government. He expressed sympathies with the Sabri family and hoped that security forces will ferret out the killers and bring them to book. Amjad Sabri was shot dead in Karachi Wednesday afternoon, after unidentified assailants fired at his vehicle in the city’s Liaquatabad area.