Israeli jets flew very low over parts of Lebanon early Friday, terrifying residents on Christmas Eve, some of whom reported seeing missiles in the skies over Beirut.
Minutes later, Syria's official news agency reported explosions in the central Syrian town of Masyaf. Other Syrian media said Syrian air defences responded to an Israeli attack near the town in the Hama province.
There was no immediate word on what the target was or whether there were any casualties.
Israeli jets regularly violate Lebanese airspace and have often struck inside Syria from Lebanese territory. But the Christmas Eve flights were louder than usual, frightening residents of Beirut who have endured multiple crises in the past year, including the catastrophic August 4 explosion at the city's port that killed over 200 people and destroyed parts of the capital. That explosion resulted from the detonation of a stockpile of ammonium nitrates that was improperly stored at the facility.
There was no immediate word from Israel on Friday's flights and alleged attacks on Syria.
In the past few years, Israel has acknowledged carrying out dozens of airstrikes in Syria, most of them aimed at suspected Iranian weapons shipments believed to be bound for Hezbollah. In recent months, Israeli officials have expressed concern that Hezbollah is trying to establish production facilities to make precision-guided missiles.
Masyaf is a significant military area for Syrian President Bashar Assad''s regime that includes a military academy and a scientific research centre. Israel has struck targets there several times in the past.