Passengers evacuated from a plane on the tarmac of Moscow Domodedovo Airport on Saturday, in response to a bomb threat on the plane that was bound for Tokyo, an air source told TASS.

"The Moscow-Tokyo flight was evacuated after an anonymous bomb threat," he said. "The threat came from Ukrainian radicals. All the required measures have been taken," he said.

TASS was told at Domodedovo that the airport had been put on a higher security alert.

"Standard security procedures are envisioned in case of anonymous threats. This incident was not an exception. After the information came, additional measures have been taken along with law enforcement agencies to ensure security," the press service said.