Tel Aviv has claimed that its assault was a response to a barrage of 20 rockets fired from Syria at Israeli military outposts in the occupied Golan Heights which it blamed on Iran.
In comments published Friday, Russian presidential envoy to Syria Alexander Lavrentiev confirmed that President Vladimir Putin's remarks on the need to withdraw foreign troops from Syria had implied Iranian forces and Hezbollah fighters as well as Turkish and American troops.
Sky News Arabic reported from Abu Dhabi Monday morning citing activists in Syria who said that powerful explosions rocked an Iranian operations center at the headquarters of the Department of Electronic War, south of the capital Damascus.
After Russia said that foreign troops should leave Syria when the war ends, Tehran responded by saying no one can force Iran to do anything.
Syrian state TV broadcast footage of tanks rolling through a shattered neighborhood once held by rebels, as government troops waved the national flag.
Assad was on a surprise visit to Russian Federation.
Denuclearise or suffer fate of Gaddafi: Trump threatens Kim
Former US negotiator Joel Wit said "This is probably the wrong time to be making threats, three weeks before the summit". He said North Korean officials are discussing logistical details about the meeting "as if nothing happened ".
"As long as it is needed, terrorism threat is not eliminated and the Syrian government's help request continues Iran will remain in Syria", Ghasemi told reporters in Tehran May 21.
Syrian troops and their allies are expected to turn their attention to opposition-held parts of southern Syria, including Daraa province, in a push that could bring allied Iranian forces even closer to the increasingly tense frontier with Israel.
The move boosts morale and security in Assad's seat of power, putting it out of range of insurgents' mortar fire and shells for the first time in almost seven years.
A war-monitoring group said about 1,600 people, including hundreds of Islamic State gunmen, left the area Saturday and Sunday, heading toward the desert in the east of the country after a deal with the government.
Mayhoub says "Damascus and its surroundings are completely secure". The Britain-based Syrian Observatory for Human Rights said government forces are now clearing the nearby Palestinian refugee camp of Yarmouk, a built-up residential area, of the last remaining IS fighters.
Syrian state media reported the blasts at the time but did not provide any details, while the Observatory had said they were likely due to a technical malfunction.