A Hamilton man, 18, suffered a head wound during a fight between two groups of men downtown early Saturday, police say.

The man was taken to hospital with serious but non-life-threatening injuries following the fight in Hess Village, according to Staff Sgt. Oliver Mann, spokesperson for Hamilton Police Service's Central Region.

"There was an altercation involving two groups of males," Mann said.

Police and paramedics were called to Hess Street South, between King Street W. and George Street, at about 2:30 a.m.

The injured man had made his way to a Tim Hortons in the area of King Street W. and Caroline Street S., where he remained until medical help arrived.

The injured man made his way to a Tim Hortons, where he stayed until medical help arrived. (Andrew Collins/CBC)

Mann said police have not yet determined what kind of weapon was used in the fight to injure the man.

"It's an edged weapon of some sort. I can't say if it was a knife," he said.

Police have not released a description of suspects and are asking the public for help.

A stretch of Hess Street S. in the area of King Street W. was closed as officers investigated, but the road has been reopened.

Anyone with information is urged to call police.