The mock improvised explosive device in a suitcase was found during an inspection of the American man's suitcase at the airport's pre-clearance area, the U.S. Customs and Border Protection officers at the airport immediately stopped processing passengers in the airport's pre-clearance facility.
The agency says the passenger was scheduled to travel on United Airlines flight 547 from Toronto to Chicago.
The official told passengers that they would be met at the isolation area by officials from USA and Canadian customs, police, and the Greater Toronto Airports Authority.
Greater Toronto Airport Authority spokesman Eron Kennedy confirmed "a security investigation" was under way, but she was unable to offer any details because it was U.S. Customs handling the probe.
Officials previously said that they were investigating a "major security breach" involving a Chicago-bound flight plane that had its pre-clearance privileges revoked.
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Flores' proposal has sailed through the Senate, receiving unanimous support in each subcommittee which has heard the measure. School districts could not stop school personnel from participating in student religious activities.
"We were told that a passenger boarded our flight from a (Sao Paulo, Brazil) flight, and their checked baggage was not cleared, so the entire flight is now tainted", Joe Sturonas, a passenger on the flight, told the Star.
Police in Peel, Ontario, told ABC News that the man who was charged has been held by authorities ahead of a bail hearing scheduled for Friday.
All passengers and luggage were removed from the plane. Gemmell said they were given several updates during that time but the information kept changing.
Pearson said its other operations were not impacted. Then, they were told sniffer dogs would be brought on board and then they would deplane.
Tory Galick told CP24 via phone that they were initially told the plane was delayed due to weather in Chicago. At that point, the plane had been holding on the tarmac for almost three hours.