A drunk passenger on a Russian internal flight caused a hijack scare Friday, Russia's Interfax news agency quoted a law enforcement source as saying. REUTERS/Graphic

MOSCOW (Reuters) - A drunk passenger on a Russian internal flight caused a hijack scare Friday, Russia’s Interfax news agency quoted a law enforcement source as saying.

A Russian law enforcement source had at first told Interfax a man shouting “Allah Akbar” had demanded the plane from the Black Sea resort of Sochi to Moscow divert to Vienna.

Later, the news agency quoted a law enforcement source as saying the aircraft’s crew had been in contact with air traffic controllers and that the incident may have been caused by a drunken passenger.

“The situation is under control,” Interfax quoted the source as saying.

Adler is a town on Russia’s Black Sea coast in the mainly Muslim north Caucasus. The nearby city of Sochi will host the 2014 Winter Olympic Games.