NEW YORK, November 6. /TASS/. The US authorities intend to tighten security at domestic airports as well as certain international airports, which operate direct flights to the United States, starting as soon as Friday, ABC News reported.

ABC News cited Josh Earnest, a spokesman for the White House, as saying on Thursday "the Obama Administration is reviewing a number of different steps that we can take to enhance security for commercial flights bound for the United States from certain foreign airports."

The news follows the fatal crash of the Russian passenger airliner over the last weekend in Egypt.

CBSnews.com reported earlier that US President Barack Obama believed it was possible that a terrorist attack could be the cause of the Russian passenger aircraft’s tragedy.

"I think there is a possibility that there was a bomb on board," President Obama was quoted as saying by CBS. "And we're taking that very seriously."

"We know that the procedures we have here in the United States are different than some of the procedures that existed for outbound and inbound flights there," Obama said. "We're going to spend a lot of time making sure that our own investigators and our own intelligence community figures out what's going on before we make any definitive pronouncements."

An A321 passenger jet of Russia’s Kogalymavia air carrier (flight 9268) bound to St. Petersburg crashed on October 31 some 30 minutes after the takeoff from Egypt’s Sharm el-Sheikh.

The debris was found 100 kilometers (62 miles) south of the administrative centre of North Sinai Governorate, the city of Al-Arish. All 217 passengers and seven crewmembers were killed. Most passengers were Russian nationals.

Among the people onboard were also four Ukrainian citizens and one Belarusian national.