The British government warned airlines to stay away from Egyptian airspace near where a Russian airliner crashed because of evidence it "may well" have been brought down by a terror attack.

An ISIS affiliate quickly claimed to have downed the Airbus 32O as it approached the Egyptian resort of Sharm el-Sheikh carrying tourists from St. Petersburg, Russia. A video uploaded online soon after the plane crash purports to show an explosion hitting the jet. Lead Stories has not been able to verify the validity of the video which is posted below.

Britain has banned its airliners from flying to or from Sharm el-Sheikh for now.

A statement from British Prime Minister David Cameron's office said the flight may have been "brought down by an explosive device."

"While the investigation is still ongoing we cannot say categorically why the Russian jet crashed," Cameron's statement said. "But as more information has come to light we have become concerned that the plane may well have been brought down by an explosive device. In light of this, and as a precautionary measure, we have decided that flights due to leave Sharm for the UK this evening will be delayed. That will allow time for a team of UK aviation experts, currently travelling to Sharm, to make an assessment of the security arrangements in place at the airport and to identify whether any further action is required. We expect this assessment to be completed tonight."

Russian and Egyptian officials have publicly downplayed the claim that it was a terror attack.

A video uploaded online soon after the plane crash purports to show an explosion hitting the jet. Lead Stories has not been able to verify the validity of the video.

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