Syrian President Bashar al-Assad has vowed to pursue an offensive against the I.S. Militants in the vast deserts of the country.

In an televised address, he said the direct political, economic and military support provided by Russia, Iran and Hezbollah movement has enabled Syrian Army to make gains on the battlefield and reduce the burden of war.

Assad said although the government forces have not yet ended the six-year old insurgency in the country but the western designs to topple his government have failed.

Meanwhile, six people have been killed and around a dozen injured in a rocket attack on an international trade fair in the Capital Damascus.

The Syrian observatory for human rights said the rocket landed near the entrance of the fair.