A Thompson taxi driver had to be taken to hospital for treatment after an incident Saturday night, RCMP said.
Around 9:10 p.m., officers were called to a business on Mystery Lake Road in the northern Manitoba city.
Police said the cab had been waiting outside the business when an unknown man got in and assaulted the driver, 40.
A 20-year-old man from Oxford House was arrested and charged with assault causing bodily harm and three counts of failing to comply.
RCMP continue to investigate.