A cyclist has suffered life-threatening injuries after he was struck in the area of Dundas Street West and Chelsea Avenue on Tuesday, Toronto police say.

Officers say they were called to the area for reports of a cyclist struck by a vehicle just before 4 p.m.

A man believed to be in his 50s or 60s was found unconscious and rushed to hospital in life-threatening condition, according to paramedics.

The driver remained on the scene, police say.

Police have closed roads on Dundas Street West and Chelsea Avenue for their investigation.