A 30-year-old Bangor man faces assault charges after police say he punched a woman who was trying to break up a fight.

Police say an officer saw Detrayvious Calvin punch another man from behind and then spotted an unconscious woman lying on the ground and bleeding from her face.

Police say the woman had been trying to break up a fight between Calvin and the other person when Calvin hit her in the face.

The woman was taken to a hospital for treatment.

Calvin was arrested and charged with assault and disorderly conduct (fighting).

Bangor Police say the altercation took place Sunday at about 12:45 am outside a Franklin Street bar.