A well-known doctor from the Laurentians has died after he suffered complications during the Ironman triathlon in Mont-Tremblant last weekend.

The cause of death of Dr. Jean-François Chalifour was not confirmed by the organization, but Ironman said in statement that he "required medical attention during the run portion of Sunday's race and was transported to a nearby hospital."

He died Tuesday night in hospital.

Chalifour, a lung specialist, worked at various healthcare institutions across the Laurentians since at least 2002, including Hotel-Dieu Hospital in Saint-Jérôme, and the CISSS des Laurentides.