Activists have claimed that Syrian rebels have captured an oil field in eastern Syria.
Al-Ward oil field was captured by the rebels after several days of fighting, reported the Syrian Human Rights Observatory.
Rami Abdel Rahman, the head of the UK-based Observatory, said: "Rebels in the Jaafar Tayyar Brigade took control of al-Ward oilfield, east of the town of Mayadin, after a siege that lasted several days."
Around 40 troops were killed in the attack, according to Mr Rahman.