Turkey has agreed to allow moderate Syrian rebels to be trained on its soil, the US says, in its bid to combat Islamic State in Syria and Iraq.

US National Security Adviser Susan Rice, who announced the development, said she welcomed the new agreement.

It has not yet been confirmed by Turkey, which has so far refused to send troops into Syria or Iraq.

Turkish MPs recently passed a motion allowing foreign forces to use its bases for activities in Syria and Iraq.

Mark Lowen reports from Ankara.