Updated at 7:01 a.m. ET: A passenger jet flying from New York to Moscow made an emergency landing in Iceland on Thursday after a caller claimed there was a bomb on board, a spokeswoman for Russian airline Aeroflot said.

Fridthor Eydal, the manager at Reykjavik's Keflavik International Airport, told NBC News the Airbus A330 with 253 passengers on board landed safely at 6:27 a.m. (2:27 a.m. ET) and the plane had been evacuated.

"There was an anonymous call saying that there was an explosive device on the plane, which was already in the air," spokesman Irina Dannenberg said.

The call was made to the New York City police, Dannenberg told the ITAR-Tass news agency.

Passengers were going through standard security procedures on the ground in Reykjavik and would later be transported to a nearby hotel, local police told NBC News.

Police planned to search the aircraft later Thursday, authorities said.

Second plane searched
Emergency teams also searched an airplane in the city of Voronezh, 300 miles south of Moscow, for explosives on Thursday after an anonymous phone call was made to the city's airport, but no bomb was found, state-run RIA reported.

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A suicide bomb blast in the international arrivals area at Moscow's Domodedovo airport in January 2011 killed 37 people. Islamist insurgents in Russia's North Caucasus claimed responsibility.

Suicide bombers identified as women from the North Caucasus blew up two planes on domestic Russian flights nearly simultaneously in August 2004, killing all 90 people aboard.

NBC News' staff, Reuters and The Associated Press contributed to this report.

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A Korean Airlines Boeing 777 sits on the tarmac of Comox Airport after being diverted from Vancouver International Airport due to a bomb threat.

Updated at 5:43 a.m. ET: Two U.S. F-15s were scrambled to escort a Korean Air passenger jet to a Canadian military base Tuesday after the carrier's call center received a "credible bomb threat," NBC News reported. The aircraft later made an emergency landing.

Korean Air flight 72, which was en route from Vancouver to South Korean capital Seoul, diverted to the Comox base on Vancouver Island in British Columbia, the airline said.

"The (Korean Air) U.S. call center received a call that there was a threat on board the aircraft," Korean Air said in a statement. The threat was received about 25 minutes after the flight took off, The Associated Press reported.

NBC News reported that Canadian authorities had requested U.S. assistance to escort the flight back to Canada.

Two Oregon National Guard F-15s, which took off from Portland, Ore., intercepted the plane and shadowed it until it landed at the Canadian base, NBC News reported.

The plane, a Boeing 777, had 147 people including 134 passengers on board, the airline said.

"The airline will decide about the continuation of the flight after discussion with the airport and related authorities," Korean Air said.

Royal Canadian Mounted Police Inspector Brian Massey told NBC News early Wednesday that cargo and luggage was being screened.

NBC News' Jim Miklaszewski and Courtney Kube, Reuters, The Associated Press and msnbc.com staff contributed to this report.

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