Syrian air defences on Thursday engaged an "enemy attack" west of Damascus, state media reported.
"Our air defences responded to an enemy attack, destroying it west of Damascus", state agency SANA quoted a military source as saying, without adding further details.
The Syrian Observatory for Human Rights said that a "missile attack hit regime and pro-regime forces positions west of Damascus" without being able to identify the side responsible.
The Moscow-supported Damascus regime often accuses Israel of attacks on its military positions.
Israel has carried out numerous raids inside war-torn Syria since 2013, targeting regime forces and their allies from Iran and Hizbullah.
Last month Syria accused Israel of bombing a military post in Aleppo, where the Observatory reported at least nine pro-regime fighters died.