Workers stumbled on two handguns and five bullets hidden in an industrial unit under renovation in Tsuen Wan last night. Police said the ammunition, wrapped inside a paper bag, was found by renovation workers when they were fixing a false ceiling in a unit on the 11th floor of the TCL Tower in Tai Chung Road. 'These workers called us at 5.46pm and told us that they found guns and bullets hidden above the false ceiling,' a police spokesman said. A large number of police officers, most of them wearing bulletproof vests, were deployed to the building to search it. No one has been arrested. The building was still cordoned off late last night. Tsuen Wan Acting Chief Inspector Li Chi-kin said the unit had been empty for at least three months and detectives were trying to locate the owners. The guns and bullets would be taken to the police station and ballistics experts would test the firearms to see if they had been part of any serious crimes. Last night's discovery comes only a month after a loaded 7.62mm-calibre handgun, also known as a Black Star, was thrown out of a taxi during a high-speed chase in Mong Kok. Three suspects were in the taxi when they noticed plain-clothes officers following them. They sped away but crashed into the back of another taxi at the junction of Waterloo Road and Yim Po Fong Street. No one has been arrested. In June, - after the seizure of a US-made Colt revolver during a robbery attempt in Sheung Wan and a Smith and Wesson 9mm after a failed murder attempt on an alleged triad boss during a soccer World Cup match - police said there was no evidence of an increase in gun crime in the city; in fact, there were fewer crimes involving guns, they said.