Search and rescue efforts on Lake Newell for a teenaged boy and his older brother have turned into a recovery effort.
They are now presumed drowned.
A third teen, was rescued thanks to the quick thinking of an area resident of the popular lake community.
RCMP say a canoe carrying the three males, two 15-year olds and a 28-year-old, capsized near the Lake Newell Resort about 15 kilometres south of Brooks.
It happened around 5 o'clock.
CTV News has learned a nearby resident was the first to arrive on scene when he heard the frantic cries for help from the water.
Police and residents say the man jumped onto his Sea-doo and managed to rescue one of the 15-year-old boys.
Other residents in the lake community saw the commotion and took their personal boats onto the lake and began combing the water for the two missing brothers.
Not long after, emergency crews arrived. A helicopter was brought in to survey the scene from above, while search and rescue boats from both Brooks and Lethbridge searched the water.
Divers also made numerous attempts to locate the missing males.
RCMP say the trio were out fishing in water approximately 6 metres deep, and that lake conditions were calm at the time.
Searchers say the murky water made it difficult to try and locate the missing males.
CTV News has learned none of the boaters were wearing life jackets.
They are investigating whether alcohol played a factor.
The search for the missing brothers, whose names have not been released, will resume early Wednesday morning.
The last tragic boating accident on Lake Newell happened last fall when a five year old girl died.
The girl's family boat hit a rock and started taking on water.
They called 911 and a rescue boat was able to get to all five members of the family but on the way back to land the rescue boat ran into trouble and capsized.
Janessa Lyn Toney got caught under the capsized boat and drowned.
