US President Barack Obama said there is a "possibility" that the crash of a Russian passenger plane in Egypt was caused by a bomb on board the airliner, cable news channel CNN reported on Thursday.
On Wednesday, Britain said that the Russian plane that crashed in Egypt this week after taking off from the resort of Sharm al-Sheikh might have been brought down by an explosive device.
"While the investigation is still ongoing we cannot say categorically why the Russian jet crashed," Prime Minister David Cameron's office said in a statement.
"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," it added.
