A man is in hospital in serious condition after he was involved in a violent assault outside a Tim Horton’s restaurant in southeast Calgary on Tuesday evening.

Police were called to the location on Shawville Boulevard S.E. at around 6:00 p.m. for reports of a fight.

They say the altercation began inside the shop and eventually wound up outside.

One man was found suffering from critical injuries at the scene and was taken to hospital. He is listed in serious condition.

Investigators are still trying to find out how many people were involved in the incident but say that no weapons were used.

A number of people were arrested, but no charges have been laid so far.