PHNOM PENH, Cambodia -- A Frenchman living in the Cambodian capital has been shot and killed in what police suspect was a botched robbery or a crime of passion.

Police say 43-year-old Franck Mathieu was shot early Tuesday while riding his motorcycle in Phnom Penh. He later died in hospital.

District police chief Houth Chan Yaran says police are searching for three suspected attackers and investigating Mathieu's Cambodian girlfriend.

The website for Cambodia's Deum Ampil newspaper quoted Mathieu's 20-year-old girlfriend as saying they had lived together several months. She said she discovered his body in the street as she returned home from a market.

A witness told the website he saw three attackers attempt to rob Mathieu. One of them shot Mathieu who refused to hand over what appeared to be a mobile phone.