The 19-year-old woman was arrested after police responded to a report of a woman in distress in the 2600 block of Pembina Highway shortly before midnight Saturday.
Police told the Independent Investigations Unit the woman, who appeared to be intoxicated, became uncooperative and resisted when officers tried to take her into custody.
After she was handcuffed the woman told police she had soreness in her left arm. She was taken to hospital where she was treated for fractures to her arm.
The IIU investigates all serious incidents involving police officers in Manitoba.
Witnesses or anyone with information is asked to call the IIU at 1-844-667-6060.