A man in his 50s has been seriously injured in a stabbing in downtown Toronto, police say. Emergency services got a call for a stabbing in the area of Richmond Street West and Bathurst Street around 5:45 p.m. Toronto police say a man in his 50s was located with serious injuries. He was subsequently taken to a hospital. Officers arrested a man in his 40s at the scene, police say. He was shortly transported to the hospital with minor but non-life-threatening injuries. The circumstances that led to the stabbing are not immediately known.