Police in Wellington County said they received a report of an armed tenant at a Harriston apartment complex on Sunday afternoon.
The OPP attended an address on Elizabeth Street just before 4 p.m. to investigate a man observed with a handgun. Police responded and arrested a 57-year-old suspect. An airsoft handgun was located in the apartment along with a "suspicious package."
The building has been evacuated and the Explosive Disposal Unit (EDU) is being consulted. Police said the town of Minto is helping to accommodate the displaced residents while they continue the investigation.