The Ontario Provincial Police (OPP) are appealing to the public for help in identifying motorcycle riders who terrorized Toronto’s highways last Sunday.

Motorists began calling complaints in after the riders appeared on Highways 401, 403, and 409, as well as the Queen Elizabeth Way, the Gardiner Expressway, and the Don Valley Parkway.

Even on a Sunday, these highways are travelled by thousands of motorists and frequently become congested even without the help of rogue motorbike riders.

OPP sergeant Kerry Schmidt said about 100 riders were “all together in a group, doing stunts (and) stopping traffic.” He added their actions verged on criminal negligence because of the potential consequences had there been a wreck as a result of their erratic behaviour.

A video of some of the action was posted to an Instagram account called “TorontoBikeMeets,” clips from which can be seen in the Global News video below.

The OPP captured its own footage from the air, and while the images aren’t of particularly high resolution, the police photos and video show the massive group of riders in action.

This isn’t the first time motorcyclists have wreaked havoc on Toronto roadways. A group ran amok in the suburb of Mississauga in September of 2016, running red lights and doing stunts while capturing the action on video and posting some of it online.

And in 2013, a mob of bikers beat a New Jersey man after he got caught up in the group while driving through the city.

(via Global News)