The Cambodian Mine Action Centre said yesterday it had collected 765 unexploded pieces of ordnance, totalling more than four tonnes of explosives, discovered in a sunken boat in the Tonle Sap  in Kampong Chhnang province late last week. The artillery and mortar shells discovered ranged from 105mm to 60mm in size and were found by a team of CMAC underwater Explosive Ordnance Disposal members scouring the river bed since June 2, after receiving information from a local fisherman who had discovered the boat. CMAC officials said they expected to recover more UXOs in the coming days.