SINGAPORE - Singapore's only medalled male cyclist at the SEA Games is being investigated by the police for alleged assault.

National cyclist Vincent Ang had allegedly slapped and hit a fellow national rider multiple times during a training ride on Sunday, and then again later that same morning at Adam Road Food Centre while the cyclists were taking a break, eyewitnesses told The Straits Times.

The 38-year-old won the SEA Games bronze during the men's criterium last month, the only male cyclist here to manage a podium position.

His alleged victim was fellow national rider Ang Kee Meng - the two men are unrelated. The 29-year-old declined to comment on the matter, but The Straits Times understands he had lodged a police report.

The first incident happened on Sunday morning during a training ride - Mr Ang had yelled at another rider after a disagreement, according to eyewitnesses. When his younger teammate came to the rider's defence. Mr Ang allegedly hit him twice - all while the group was still on their bikes.

It has also been alleged that Mr Ang then again hit the younger national cyclist again at Adam Road hawker centre that same morning.

A police spokesman confirmed a report was lodged and that they were looking into the matter.

When contacted, the older Mr Ang declined to comment. But the veteran cyclist is no stranger to controversy.

In February, pictures of Mr Ang cycling with his two-year-old son in one hand and mobile phone in the other - all this while wearing the national jersey - were posted on citizen journalism website Stomp, earning the ire of netizens.

A month later, he was involved in an incident with a car driver who allegedly ran over Mr Ang's bicycle.

Singapore Cycling Federation general manager Mahipal Singh told The Straits Times on Wednesday that it was investigating the matter.

"The Federation is looking into it and is concerned," said Mr Singh. "It's an unpleasant incident, and depending on what we establish we cannot condone such actions."