"They [the Israelis] are supporting the rebels in Syria. It’s very clear. Because whenever we make advances in some place, they [the Israelis] make an attack in order to undermine the army," Assad said. "That’s why some in Syria joke: “How can you say that al Qaeda doesn’t have an air force? They have the Israeli air force.”
The comments come a week after a missile attack, presumed to have been carried out by Israel, in the region of Quneitra in the Syrian Golan Heights bordering Lebanon.
However, Israel has not confirmed its involvement in the incident.
The Lebanon-based Hezbollah has been allegedly helping the Syrian government fight the Islamic State and radical Sunni militants.
Hezbollah is a Lebanese Shiite Islamist political party and militant group established in 1985. It is considered a terrorist organization by Israel and a number of Western countries.