A two-vehicle collision near Yonge Street and Finch Avenue left one woman dead and sent three other people to hospital on Monday.
Paramedics say they were called to the scene at 12:13 p.m.
An elderly female suffered life-threatening injuries in the crash. Police later reported that she had died.
Two other patients were taken to a trauma centre with serious, but non-life threatening injuries.
A fourth patient was taken to hospital with non-life threatening injuries.