The Chicago Fire Department and United States Coast Guard are responding to reports of a man falling into the water from a boat competing in the Race to Mackinac.
The boat was nearly four miles offshore from Navy Pier when the incident took place, according to authorities. Race organizers say that the Coast Guard alerted them to the search at approximately 3 p.m. Saturday aftenroon.
The man was identified by authorities as 53-year-old Jon Santarelli, who lives in Lincoln Park.
According to authorities, Santarelli was wearing red gear when he went overboard from the boat "Imedi." There were life-jackets on the boat, but it's unclear if he was wearing one.
As of 9 p.m., the search was called off due to darkness, according to authorities. The search is set to resume Sunday.
High waves caused problems in the search.
Multiple agencies spent Saturday afternoon searching for the man, with a total of 20 boats and three helicopters aiding in the search, according to authorities.
The incident occurred approximately five miles from the start line of the race.