Egyptian officials say there are no survivors of a Russian airliner crash in the Sinai (PRON: Sigh-Nye) desert.

The jet was carrying 224 people - mostly Russian tourists.

Russia's president Vladimir Putin has declared a national day of mourning tomorrow.

The black box, containing aircraft data, has been recovered as investigators work to find out the cause of the crash.

Sky's Middle East correspondent Sherine Tadros is in Cairo: