Hollande in Syria warning.

The French President Francois Hollande is being reported to have said that if Syria use chemical weapons, it would be a "legitimate reason" for military intervention.

The stark warning to the Syrian regime comes after Obama and Cameron issued warnings that the use or threat of chemical weapons would force them "to revisit their approach".

Hollande also called on Syrian rebels to form a government because if they did, France would recognise It.