Last month, Israel fired a missile at a drone that approached its airspace near the Syrian frontier, and in February Israel shot down what it said was an Iranian drone that entered its airspace.
Supposedly Israel waited 15 minutes before shooting it down, so they could check with the Russians, and make sure it wasn't theirs before shooting it down.
Israel held out the prospect on Tuesday of eventual contacts with Syria under President Bashar al-Assad, in a nod to his regime-consolidating advances in a seven-year-old civil war that Israeli officials had initially predicted would topple him.
The incident took place as Prime Minister Benjamin Netanyahu visited Moscow to stress to Russian President Vladimir Putin that Israel will not tolerate an Iranian military presence in Syria.
Syrian military air defenses have repelled an Israeli attack on the country's Quneitra province, Syrian state media report.
The Israeli leader has met with Putin numerous times since Russia's military intervention in Syria began three years ago.
The Netanyahu government is detemined to keep fighters loyal to Assad and to Iran out of the Syrian Golan border area near Israel.
Asked by a reporter if he anticipated a time when the Quneitra crossing would be reopened under the United Nations -monitored armistice between Israel and Syria, and whether the two old enemies could establish "some kind of relationship", Lieberman said: "I reckon we are a long way from that, but we are not ruling out anything".
Russian Federation is Assad's big-power backer in the seven-year-old civil war. Its air force has struck scores of targets it describes as Iranian deployments or arms transfers to Lebanon's Iran-backed Hezbollah.
However, Lieberman appeared to signal acknowledgment that Assad would regain control of the Syrian side of the Golan.
However, the army did not clarify whether the unmanned aerial vehicle was intercepted over the Golan Heights, which Israel occupied during the 1967 war with Syria. Netanyahu's government has made clear it would not now cede the Golan and has been lobbying for USA recognition of Israel's claim of sovereignty there.
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