Toronto FC suspended privileges for its recognized supporter groups in response to a number of incidents that occurred in the stands during Wednesday's Canadian Championship semi-final first leg on the road against the Ottawa Fury.

"The safety of our fans, employees, and supporters is the highest priority for TFC. The events which took place in Ottawa last night involving TFC supporters were unacceptable and needlessly put the safety of others at risk," club president Bill Manning said in a statement. "Due to the seriousness of this incident, we are left with no choice but to suspend all recognized supporter group privileges indefinitely as we conduct a thorough review of TFC’s recognized supporter program."

Fan video from the match appears to show a group of TFC supporters fighting to put out flames on their own flags before what looks to be a TD Place Stadium staff member intervened with a fire extinguisher.

Flares could also be seen burning on the pitch in front of the same fans, while an explosion - apparently the result of a smoke bomb - could be heard as well.

Way to go @tfc supporters. Starting a fire, burning your banners, and nice explosion. pic.twitter.com/Q2lPlnyexw — Paul Mullin (@paulmullin13) July 19, 2018

Ottawa Police are investigating the incidents, and Manning said his club is "fully cooperating."

Toronto lists six official supporter groups on its website: the Red Patch Boys, U-Sector, Kings in the North, Inebriatti, Original 109, and Tribal Rhythm Nation.

TFC won the match 1-0. The Fury will visit BMO Field for the return leg on July 25.