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.
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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.