Syria's army high command has said its air defences shot down an Israeli jet over what it called "occupied ground" and damaged another.
It said Israeli jets breached Syrian air space early this morning and attacked a military target near Palmyra in what it described as an act of aggression that aided the so-called Islamic State.
Israeli warplanes "penetrated our air space at 2.40am (0040 GMT) via Lebanese territory and hit a military target on the way to Palmyra," the army said in a statement carried by state news agency SANA.
The Israeli air force had earlier said it carried out several strikes on Syria overnight.
Palmyra is the ancient desert city Syria recaptured from jihadists earlier this month.