Israel carried out a missile attack near the Syrian capital of Damascus and its southern suburbs early Thursday killing at least three pro-Iranian fighters, a war monitor reported.
"We have information that they were not Syrian nationals," observatory head Rami Abdel-Rahman told DPA.
He added that the number of dead is likely to rise as the attack left an unspecified number of injured some of them in critical condition.
Syrian state news agency, SANA, quoted an unidentified military official as saying that Syrian air defenses were able to shoot down most of the missiles before they hit their targets and that four soldiers were injured in the attack.
Al-Manar TV of Lebanon’s militant Hezbollah group said one of the Syrian air defense missiles exploded near the Lebanon-Syria border and was heard in parts of southern Lebanon. It later said the missile crashed near the Lebanese border village of Houla.
Israel has launched hundreds of strikes against Iran-linked military targets in Syria over the years but rarely acknowledges or discusses such operations.
Israel views Iranian entrenchment on its northern frontier as a red line, and it has repeatedly struck Iran-linked facilities and weapons convoys destined for Lebanon’s militant Hezbollah group.
So far, there has been no official comment from Israel.