The raids against militant positions south of the town of Albu Kamal in Deir Ezzor province took the lives of eight Iraqi and two Syrian combatants, the Syrian Observatory for Human Rights said.
Observatory chief Rami Abdel Rahman said the strikes, which also destroyed munition depots and vehicles, were “likely” carried out by Israel.
The Observatory has previously reported suspected Israeli air strikes on Deir Ezzor, but these reports are rarely corroborated by Syrian state media or the Jewish state.
A US-led coalition is also present in the area after years of backing Kurdish forces in their fight against the Daesh group.
On September 3, presumed Israeli air strikes on eastern Syria killed 16 Iran-backed fighters, the Observatory said at the time.
The monitor says it relies on flight patterns, as well as type of aircraft and ammunition involved, to determine who was behind an aerial bombing.
Along with Russia, Israel’s nemesis Iran has been a key backer of the Damascus regime in its nine-year-long civil war.
Israel has carried out hundreds of air and missile strikes on Syria since the civil war broke out in 2011, targeting Iranian and Lebanese Hezbollah forces as well as government troops.
The Israeli army rarely acknowledges individual strikes, but did confirm on August 3 that it had used fighter jets, attack helicopters and other aircraft to hit military targets in southern Syria.
Syria’s war has killed more than 380,000 people and displaced millions more since starting in 2011 with the brutal repression of anti-government protests. A Syrian military official said Israel’s military fired missiles Monday night on areas south of the capital Damascus.
The unnamed military official gave no further details adding that Syrian air defenses opened fire on “hostile targets.”
It was not clear what the targets were but state TV said the strikes were carried by warplanes flying Syria’s Israeli-occupied Golan Heights. The air raids started shortly before 11 p.m. (2000 GMT).
Residents of the capital Damascus said they heard explosions south of the city.
An opposition war monitor said Israel’s military targeted military posts south of Damascus. The Britain-based Syrian Observatory for Human Rights said Syrian air defenses were responding to the attack.
Israel rarely comments on such reports, but is believed to have carried out scores of raids targeting Iran’s military presence in Syria. In the past three months alone, Syria has accused Israel of carrying out at least eight air raids on its territory. The last reported strikes came on July 20.
Iran is a key ally of the Syrian government in the nearly decade-long civil war. Israel views Iran as a regional menace and has vowed to prevent any permanent Iranian military buildup in Syria, particularly near the frontier.
In recent months, Israeli officials have also expressed concern that Hezbollah, an Iran-backed Lebanese militant group that operates in Syria, is trying to establish facilities to produce precision-guided missiles. Tensions have also risen along the Israel-Lebanon border.
During last month's strikes on Syria, a Hezbollah member was killed and the Lebanese militant group vowed to retaliate against Israel. On Sunday, Hezbollah leader Hassan Nasrallah vowed to kill Israeli soldiers whenever they kill Hezbobllah fighters in Syria.
