Britain said it was concerned Wednesday that a Russian airliner that crashed in Sinai may have been brought down by a bomb, prompting it to temporarily suspend flights from Egypt's Red Sea resort of Sharm el-Sheikh.

"While the investigation is still ongoing we cannot say categorically why the Russian jet crashed. 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," the office of Prime Minister David Cameron said in a statement.