A Paris-bound Air France flight from San Francisco was diverted to Montreal late Monday due to what the airline described as an "anonymous threat".<br />The airline said Flight 83 landed at Montreal-Pierre Elliott Trudeau International Airport without incident and local authorities were inspecting the plane.<br />According to the flight tracking website FlightAware, the Boeing 777 took off from San Francisco International Airport shortly after 3 p.m. local time and was due to land in Paris Tuesday morning.<br />Passenger Thomas Serval posted pictures of the inside of the cabin as passengers were taken off in small groups.