Toronto police are investigating after smoke and a noxious odour were reported coming from a manhole cover on Queens Quay Saturday evening.
Officers responded to the area of Queens Quay and Lower Simcoe Street near Harbourfront Centre around 6 p.m.
The manhole is located near a streetcar loading platform and police have taped off the entire platform and a small portion of the surrounding area.
The TTC had re-routed the 509 and 510 streetcar routes for several hours but regular routes are back in service.
No word on the cause of the smoke at this time.