Syria has begun circulating new currency bills, a year after Bashar Assad's government fell. Central Bank Governor Mokhles Nazer said Saturday that the exchange of old Syrian pounds with new banknotes has officially started.

The airstrikes on ISIS targets are being conducted in response to the killing of two U.S. Army soldiers and an civilian contractor by a lone terrorist in Palmyra, Syria.

Britain’s and France’s air forces conducted a joint operation on Saturday evening to bomb a suspected underground arms cache previously used by the Islamic State group in Syria, Britain’s defence ministry said.

Europe stepped back into the Syrian conflict this week. France and the UK carried out joint and coordinated airstrikes against ISIS targets, signalling a renewed willingness to use military force beyond their borders.

Jordan confirmed that its air force took part in the U.S. air strikes "targeting several ISIS positions in southern Syria."

The clashes came two days after a bombing at an Alawite mosque in the city of Homs killed eight people and wounded 18 others during prayers.

At least four people have been killed and dozens wounded in clashes on Syria’s coast in the aftermath of the deadly bombing of an Alawite mosque.

“If Syria fails to integrate all armed forces and former opposition groups into its army, it faces an existential challenge of fragmentation and disintegration,” Caroline Rose, director of military and national security priorities at the New Lines Institute, told Al Jazeera.