Ontario Provincial Police say they have discovered what they believe to be the body of a 31-year-old Mississauga man who went missing in Belwood Lake Sunday afternoon.

OPP say teams recovered the body belonging to Sathees Gnanenthiran and brought it to shore around 12:30 p.m.

Fire crews were called to the scene just after 4 p.m. Sunday after a man went missing when two brothers fell out of a boat.

Centre Wellington Fire officials had about 25 firefighters working in three boats searching the water during afternoon.

Police say that four people were out boating when Gnanenthiran went into the water for a swim and his brother jumped in after noticing Gnanenthiran was in distress.

“They had stopped to go swimming the first man jumped in, but then pretty quickly became overcome. The second man seeing the first man in distress went to assist him but he was also struggling to keep afloat, said Constable Joshua Cunningham of the Wellington OPP.

He says after seeing the commotion a nearby boat came over to help.

One person aboard that board jumped into the lake to pull one of the men out, but the first man was still struggling and went under water.

OPP say both men that fell in the water were not wearing life jackets at the time.

They say there were life jackets on the boat and when the men were struggling in the water one person on board attempted to throw a life jacket to them, but due to the wind it was blown away out of reach.

Crews worked to search the water for the missing man until dusk last night.

The Ontario Provincial Police Search and Rescue team was on scene for the recovery mission Monday at day break.

Wellington County also had their boats out, and Centre Wellington Fire was there to assist in the search.

The search was launched out of the Highland Pines Campground on Country Road 19.

People are being asked to avoid the area.

The coroner is currently investigating the cause of death.

With reporting by CTV's Natalie van Rooy