Syrian and Russian warplanes conducted a spate of coordinated air strikes against ISIS near Tabqa Air Base which resulted in the destruction of many of the terrorists’ military and logistics vehicles.

The attacks have impaired ISIS ability to supply its forces near the recently-liberated city of Palmyra with arms, medical equipment and food.

The airstrikes came shortly after sources said that scores of ISIS terrorists had been killed and many more wounded after the pro-government battalions of Raqqa province's tribal forces clashed with the terrorists in the area.

"The tribal forces and the Syrian Army have advanced against the ISIS terrorists in Qabaqeb and al-Tim oil well and are pushing towards the city of Raqqa," the sources said.

Meanwhile, fighting has erupted between a militant group and ISIS near Damascus, where Jaysh al-Islam (the Brigade of Islam) stormed ISIS positions to the northeast of the capital, according to the sources, which cited a heavy death toll from the fighting.

Syria has been mired in a civil war since 2011, with forces loyal to the country's President Bashar Assad fighting a number of opposition factions and extremist groups, including ISIS and the Al-Nusra Front, which have been blacklisted as terrorist organizations by many countries, including Russia.

In February 2015, the UN Security Council unanimously adopted Resolution 2268, endorsing a Russia-US agreement on the cessation of hostilities in Syria; the ceasefire came into force shortly thereafter, on February 27, and fighting throughout much of the country subsided. However, ISIS and the Al-Nusra Front were not included in the truce.

Between September 30, 2015 and March 14, 2016, the Syrian Army's anti-terror efforts were backed by an extensive Russian air campaign. During that period, more than fifty Russian warplanes, including Su-24M, Su-25 and Su-34 jets, conducted precision airstrikes on ISIS and Al-Nusra targets in Syria at the behest of President Assad.

However, on March 14 Russian President Vladimir Putin announced that the Russian Aerospace Forces unit had fulfilled its mission in Syria and that its withdrawal would begin the following day. Nonetheless, Russian air power was used by Assad's forces in the liberation of the ancient city of Palmyra.

Moscow will maintain a military presence in Syria, although a deadline for a complete pullout has not yet been announced. Putin also indicated that Russian forces will remain at the port of Tartus and Hmeymim Airbase, Sputnik reported.

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