Police seized military grenades and a large quantity of firearms from a man once considered to be Hong Kong's most wanted criminal, the Court of First Instance heard yesterday. Early on December 24, 2003, a team of police special duty unit officers used explosives to enter a flat in Yau Ma Tei to arrest Kwai Ping-hung, who is also known as Guan Derong. Kwai, now 44, was suspected of shooting a police officer in Waterloo Road more than two years earlier. During the search, police found seven standard military grenades with high explosives and in good working condition - five People's Liberation Army models and two Soviet types, prosecutor Alain Sham said. Officers also uncovered a large quantity of firearms and ammunition in the flat, including an AK-47 rifle, the court was told. Kwai went on trial yesterday after he pleaded not guilty to five charges including the attempted murder of a policeman, Constable Sze Kwan-ming, who has since been made a sergeant. The other charges were an alternative count of shooting with intent; one of possessing a pistol and 15 rounds of ammunition without a licence; a separate joint charge with Ng Chun-keung, 46, of possessing an assault rifle, two shotguns, six pistols, and 887 rounds of ammunition; and a joint charge with Ng of possessing seven grenades and three fuse plugs. Ng has denied the charges but admitted one of possessing an identity card that did not belong to him. The shooting happened when a team of plain-clothes officers on an anti-burglary operation tried to stop four men on busy Waterloo Road on May 22, 2001, the court heard. A bullet hit Sze near his left eye and emerged from his left lower jaw. Another police officer, Constable Lai Chi-wai, was shot in his back and suffered a spinal injury that has left him partially disabled. The hearing continues today before Mr Justice Michael McMahon.