Durban - Police swooped on a shop in the Durban China City in Springfield Park on Thursday following a News24 report on the ease with which blue police lights can be purchased.One can, within minutes, purchase a blue LED dash light and a siren from a shop in the mall.A light was purchased last week Thursday and at no point did the store clerk request police identification. Since the story was run on News24, the blue lights seemed to have disappeared from the store.Police spokesperson Brigadier Jay Naicker said officers and South African Revenue Service officials descended on the shop."A joint operation was conducted between SAPS, SARS, Customs and the eThekwini Business Unit," he said. "No blue lights were found on the premises, however a notice has been put up to indicate that no blue lights will be sold to people without police identification. We will continue to conduct regular inspections on the premises," he said.Naicker said the SAPS had service contracts with national suppliers to provide blue lights.Institute for Security Studies senior researcher Dr Johan Burger earlier said criminals posing as police officers had become all too problematic.Last year, Durban police warned of a gang posing as policeman that was terrorizing Durban suburbs. Their modus operandi included hijacking and armed robbery, police had said.