(CNN.com)

A fire department staff and a senior citizen died following an IRONMAN 70.3 Triathlon in Madison, Wisconsin, USA.

Todd Mahoney, 38, an apparatus engineer with the fire department, and Michael McCulloch, 61, of Cottage Grove, Wisconsin, both died during the swimming portion of the multi-sport race.
The IRONMAN 70.3 consists of a 1.9km swim, 90km bike ride and a 21km run raced consecutively.
McCulloch was rescued from Lake Monona by the Madison Fire Department, taken to the hospital and later pronounced dead while Mahoney was rescued when he was found unresponsive in the lake. He died after he was transported to a hospital.
Mahoney was a nine-year veteran of the fire department and occasionally was an aide to the chief. He is survived by his wife and three young sons, the department said.
McCulloch’s death “was consistent with an accidental drowning due in part to a medical event”, while Mahoney’s cause of death has yet to be confirmed according to The Dane County medical examiners.
Source: CNN