Islamic State militants have killed three captives in Syria's ancient city of Palmyra by tying them to columns and blowing them up, activists say.

The Islamic State jihadist group executes three people in Syria's ancient city of Palmyra by binding them to three historic columns and blowing them up, a monitoring group said.

Islamic State militants in northern Syria have blown up another monument in the ancient city of Palmyra, officials and local sources say.

Syrian government war planes have launched one of the heaviest bombardments yet on the city of Palmyra, which is held by Islamic State (IS) militants, activists say.

The Islamic State (IS) militant group has destroyed part of another temple at the ancient Syrian site of Palmyra, activists and witnesses say.

A video apparently released by the Islamic State group shows 25 men being shot dead in the ancient city of Palmyra, in Syria.

A rare bird may become extinct in Syria because of the capture of Palmyra by Islamic State, experts say.