Officers in Penticton said one person was sent to hospital and another one was charged after a downtown altercation.
Mounties said on Feb. 1, several officers descended on Main Street where two people were in an altercation.
One man was sent to hospital with serious injuries.
A 28-year-old man was located nearby, arrested, and remains in police custody. He's charged with aggravated assault.
Anyone who may have witnessed the situation is being asked to come forward.