Police are investigating an assault outside the Mansion House in St. Catharines.
It happened early this morning around 1:30a.m at the William Street bar.
Police arrived to find a victim outside the back parking lot that exits onto Ontario Street with an injury to his head.
The extent of the injury was unknown at the time.
The investigation was taken over by the St Catharines detective office.
Detectives learned that the victim was transported to hospital with significant injury to his face and head.
The suspect in this incident is described as a white man, around 25 to 30 years of age.
Investigators are urging anyone with information regarding this incident to contact the 1 District Detective office at 905-688-4111 ext 4307 or 4358 or by calling Crime Stoppers of Niagara.
To leave an anonymous tip, please contact Crime Stoppers via: Telephone - 1-800-222-8477 (TIPS) Online - www.niagaratips.ca or Text - 274637(CRIMES), keyword Niagara, then your tip.