Saudi Arabia is responding to the recent Russian air strikes on Syrian rebels by stepping up its supplies of lethal weaponry to three different rebel groups, a Saudi government official has told the BBC.

The well-placed official, who asked not to be named, said supplies of modern, high-powered weaponry including guided anti-tank weapons would be increased to the Arab- and western-backed rebel groups fighting the forces of Syria’s President Bashar al-Assad and his Russian, Iranian and Lebanese allies.

He said those groups being supplied did not include either Islamic State (IS) or al-Nusra Front, both of which are proscribed terrorist organisations. Instead, he said the weapons would go to three rebel alliances – Jaysh al-Fatah (Army of Conquest), the Free Syrian Army (FSA) and the Southern Front. […]