Police on both sides of the border are involved in a search for a man in the waters of Rainy River.
OPP say the unnamed 27-year-old was with another who attempted a swim last night into the river, returning back to the Emo public dock, a distance of about 60 metres.
The one man returned safely.
An OPP Marine unit, with help from Koochiching County Sheriff's Department are patrolling the area.
An OPP dive team is also responding.