(ANSA) - Foligno, September 5 - Police are investigating the murder of 25-year-old man found Wednesday in his bicycle repair shop in the centre of the Umbrian town Foligno. The man, originally from Poland, was found with as many as five stab wounds to his chest and abdomen, likely caused by a screwdriver. A man found nearby with blood-stained clothing is being questioned, said investigators. Police speculate that a love triangle may be the motive for the slaying which has upset the small town in central Umbria. "Murder is a serious matter. This has shaken the citizens of Foligno," Mayor Nando Mismetti said.