Ground stops were lifted at international airports in Ottawa and Montreal after a bomb threat on Thursday briefly halted departing flights, a US Federal Aviation Administration spokesperson said.
The Ottawa Macdonald–Cartier International Airport said on X that it was investigating a security incident and warned that operations may be disrupted, urging travelers to check their flight status, Reuters reported.
Air traffic control manager NAV Canada said in a statement that it was made aware of bomb threats affecting several of its facilities.
It said employees at affected locations were safely evacuated and that travelers may face delays.
The Ottawa Police Service also said on X that it was investigating a security incident at the Ottawa airport.