A series of explosions occurred near Syria's Damascus International Airport Thursday morning, according to the New York Times.
22 February 2017: Israeli aircraft reportedly bomb several Syrian air bases near Damascus, including a Hezbollah convoy travelling with the Syrian army.
The depot handles a significant amount of weapons that Tehran, a major regional ally of Syrian President Bashar al-Assad, sends regularly by air, the source who requested anonymity said, without giving further details.
An Israeli military spokeswoman declined to comment.
Last month, Israel took the rare step of confirming that it had carried out several strikes in central Syria, also against what it said were efforts to transfer weapons to Hezbollah.
However, in an interview with Army Radio, Intelligence Minister Yisrael Katz indicated that there could have been Israeli involvement.
'The blast was huge, ' Observatory chief Rami Abdel Rahman told AFP.
Al-Manar is affiliated with Hezbollah, an ally of the Syrian government.
Local media reported that the projectile was a drone that crossed from Syria to Israel's aerial territory. "We must prevent Iran from establishing a military presence in Syria", Katz also said.
A senior Syrian official threatened a military response to an alleged Israeli strike on a Hezbollah-operated weapons hub near the Damascus airport on Thursday.
Israel has largely stayed out of the fighting in Syria, though it has carried out a number of airstrikes on suspected Iranian weapons shipments it believed were bound for the Lebanese militant group Hezbollah.
The Israeli military Twitter account announced it had intercepted a "target" using its Patriot missile defence system over the Golan Heights on the border with Syria, without elaborating.
Yahya, the analyst, said Israel is increasingly anxious about the potential arsenal that Hezbollah's could acquire and the weapons already available in Syria.
Syria has been embroiled in a civil war since 2011.
Hezbollah is a Lebanese terrorist organization that fought a war against Israel in 2006, and is sponsored by Iran.