Police in Montreal arrested a 71-year-old man after a suspicious item in his baggage grounded flights at Trudeau Airport for three hours, officials said. Screening officers contacted police early Sunday after finding the suspicious item in the man\'s bag as he was being screened before his flight to Los Angeles, said Mathieu Larocque of the Canadian Air Transport Security Authority. They found \"something else in the baggage which is not typical stuff you would travel with,\" police spokesperson Ian Lafreniere said. Officials searched and questioned other passengers aboard the man\'s flight out of concern the item found in his bag may have been part of an incomplete explosive device, CTV News reported. The device was not found to be explosive in nature, but it, along with the man\'s bag, were sent to a laboratory for further analysis, The (Montreal) Gazette reported. The investigation led police to a duplex in LaSalle Sunday afternoon, where officials evacuated 20 nearby neighbors as they used a robot to search the home, The Gazette reported. Whether the duplex was the man\'s home was unclear. Police found no explosive devices in the duplex and allowed residents to return home four hours later.