ATLANTA -- A Delta Air Lines flight bound for Atlanta was forced to make an emergency landing Sunday due to an unruly passenger.

A Delta representative, who called the incident a security threat, told Channel 2 it happened aboard flight 47. Officials said the plane took off from Moscow and made an emergency landing in the Canadian town of Gander, Newfoundland.

Delta said there are about 200 passengers on the Boeing 767.

They confirmed the plane was met with Royal Canadian mounted patrol in Gander.

Delta didn’t release details Sunday, but said the incident was grave enough to re-route the flight to another country where the problem passenger could be dealt with Sunday.

“They are going to get everyone back to Atlanta safely,” said Delta spokesman Susan Elliott. “This is a rare occurrence.”

The flight was scheduled to land at Atlanta's Hartsfield-Jackson International Airport Sunday night.