Police are searching for two suspects they believe tossed a stink bomb onto the subway Friday, causing a partial shutdown and the evacuation of Museum Station during rush hour.

Two men were caught on security cameras throwing the stink bomb onto a train at St. George Station just as the doors closed at about 4:30 p.m., said Toronto police Const. Craig Brister.

When the train reached Museum station, the noxious smell of rotten eggs had already been unleashed. The TTC immediately halted subway service between St. George and Union stations and evacuated Museum, forcing disgruntled commuters to try and find alternate, less pungent routes home.

Toronto Fire Services Capt. David Eckerman said reports suggested a passenger may have kicked the apparent stink bomb onto track level at that time.

The smell was bad enough that someone onboard the train pulled the emergency alarm, Toronto Fire Services Capt. David Eckerman said. Though police said one person was being treated at the scene for minor injuries, paramedics said they hadn’t transported anyone from the scene, located near Queen’s Park and Charles St. W.

“That time of day on a crowded train, it could’ve been much worse,” said Brister.

“Unfortunately, things like this are beyond our control and we wanted to ensure safety was the top priority,” said TTC spokesperson Jessica Kosmack, who also said investigators are treating the incident as an act of mischief.

Kosmack said the TTC’s decision to halt subway service was made out of an abundance of caution, since crews didn’t immediately know if the smell was harmful or not.

“We do understand it’s extremely frustrating, especially during rush hour, and we thank customers for their patience,” she said.

Hazardous materials crews gave the all clear at about 5:20 p.m., saying the foul odour was not dangerous. The TTC resumed service about 10 minutes later.

The TTC said it didn’t have information on how many customers may have been affected by the shutdown, or how many commuters typically use that portion of the system during the Friday evening rush hour.

Brister said Toronto police have identified the two suspects, and will release their photos as soon as possible. If caught, Brister said the pair will likely face mischief charges.