A Turkish Airlines flight from New York to Istanbul was diverted to Canada after a bomb threat, police have said.
No explosives were on board the plane, the Nova Scotia branch of the Royal Canadian Mounted Police said.
The plane landed safely at Halifax airport and police searched it using dogs trained in explosives.
The police force tweeted: "Investigation into bomb threat is in its early stages. Threat was received at 10:50 p.m. this evening.
"#RCMP will not be commenting on the details of the bomb threat. This will form part of the investigation.
#RCMP is looking to establish the origin of the threat and identify the person or persons responsible.@HfxStanfield
— RCMP, Nova Scotia (@RCMPNS) November 22, 2015
Separately, Halifax airport tweeted that the transfer of the 256 passengers and crew on the flight to the terminal was going smoothly and all were safe.
The plane is set to continue its trip to Istanbul later today.
On 17th November, Air France Flight 55 from Dulles International Airport outside Washington was diverted to Halifax after an anonymous bomb threat was phoned in after the plane had taken off.
The FBI said authorities had investigated and found no credible threat, while the RCMP said investigators found no evidence of an explosive device.
That threat came after the Paris attacks that killed 130 people and heightened security concerns worldwide.