Provincial police are appealing for witnesses in an assault investigation in Gravenhurst.

The OPP say there was an altercation between two drivers on Southwood Road near Beiers Road sometime between 6:30 a.m. and 8:00 a.m. Tuesday.

A Mississauga man, 58, was sent to hospital to be treated for non-life threatening injuries.

Anyone with information is asked to contact police or Crime Stoppers.