A teenager was airlifted to a Toronto-area hospital following a boating accident on Clement Lake, north of Wilberforce, Ont., on Wednesday afternoon.
Haliburton Highlands OPP responded around 4 p.m. No other details have been provided.
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On Thursday morning, police said the 13-year-old boy remains in serious condition.
Anyone with information is asked to contact the Haliburton Highlands Detachment at: 1-888-310-1122.