U.S. Customs and Border Protection released a photo on Monday, April 17, of what they called a fake bomb which was found inside a passenger’s suitcase at Pearson International Airport earlier this month.

Transport Canada has launched an investigation into the bizarre incident on April 6, when a U.S. citizen was charged with mischief after a "mock improvised explosive device" was found in a Chicago-bound passenger's luggage.

A spokesperson for Transport Canada told the News in a statement via email that "as part of Transport Canada's security oversight program, aviation security incidents are subject to followup and investigations. We will not be making further comments at this time as the investigation is ongoing."

A planeload of passengers heading to Chicago's O'Hare International Airport aboard United Airlines flight 547 spent hours sitting on the tarmac due to the incident. U.S. Customs and Border Protection were involved and issued a statement about finding the fake explosive in some luggage.