A 43-year-old man suffered serious injuries when the motorcycle he was riding was struck by a vehicle in Innisfil.
South Simcoe Police say the collision happened at the intersection of Innisfil Beach Road and Sideroad 10.
The bike rider, who is from Innisfil, was airlifted to a Toronto trauma centre.
Police charged the driver of the other vehicle, a 90-year-old Innisfil man, with careless driving causing bodily harm.
A few hours later, officers responded to another collision involving a motorcycle.
Police say a vehicle struck a motorcycle in the area of 6th Line and Yonge Street.
The motorcyclist, a 56-year-old New Brunswick man, was taken to a local hospital with minor injuries.
The other driver, a 49-year-old Innisfil man, was charged with careless driving.