Israel's intelligence minister hinted that Israeli warplanes struck a suspected Hizbullah weapons depot near Damascus International Airport on April 27.
Israel generally neither confirms nor denies involvement in such attacks.
Israeli Prime Minister Benjamin Netanyahu also declared in late March, "When we identify attempts to transfer advanced weapons to Hezbollah and we have intelligence and it is operationally feasible, we act to prevent it".
"The Syrian army and its allies will work to thwart the new Israeli plot on the occupied Golan border and will continue to destroy the enemy's collaborators", a Syrian military source said to Lebanese news site el-Nashra, claiming the missiles had destroyed fuel tanks.
The strikes prompted Syria to launch retaliatory ground to air missiles, one of which was intercepted over Israeli territory in the most serious flare-up between the two neighbours since the Syrian civil war began six years ago. Citing a regional intelligence source, Reuters reported weapon supplies from Tehran, Iran are routinely sent to the area near Damascus airport by commercial and military cargo planes. Pro-government site Damascus Now said the explosion was near the city's Seventh Bridge, which leads to the airport road.
Hillary Clinton blames herself - and misogyny, FBI and Russia - for defeat
The event also included many of her former aids and was to benefit female survivors of war around the world. So, I mean, you just can't make this stuff up".
On Wednesday, Israel's Defense Ministry said Minister of Defense Avigdor Liberman had discussed the situation in Syria with Russia's Defense and Foreign Ministers during an global conference in Moscow.
Israel regards Hezbollah, and its key backer Iran, as its biggest threat.
The Israel Defense Forces (IDF) has refused to comment on the incident.
Israel and Hezbollah fought a devastating 34-day war in 2006 which killed 1,200 people in Lebanon, mainly civilians, and 160 Israelis, mostly soldiers.
Israel's commitment to carrying out strikes and warning to the Syrian regime may explain Assad's apparent decision not to engage the Israeli aircraft bombing a target in his own capital.