Two people were hospitalized after a four-vehicle collision on the Don Valley Parkway Sunday night.

Emergency crews responded to the scene near Don Mills Road shortly before 9 p.m. Toronto police reported that a woman in her 30s sustained serious but non-life-threatening injuries, while another individual suffered minor injuries.

The incident led to the closure of all southbound lanes south of Don Mills Road, causing significant traffic delays. Northbound traffic was also reduced to one lane.

The cause of the crash remains unclear.