A ceasefire has come into force in Syria.

It came into force at 16.45 (Irish time), but there are questions as to whether it will hold.

The deal, which doesn't include the Islamic State or rebel groups linked to Al Qaeda, came after months of talks between Russia and the US.

Violence has continued in the run-up to the deadline, with around 100 people killed in airstrikes this weekend.

Earlier President Assad vowed to retake all areas of the country from rebels: