Russian strategic bombers fired advanced cruise missiles at Islamic State targets in Syria today from a distance of 1,000 kilometres (621.37 miles) in a show of force Moscow said demolished three ammunition depots and a command post.

Moscow carried out the attack just two days before President Vladimir Putin and US counterpart Donald Trump are due to hold heir first face-to-face meeting at the G20 summit in Hamburg, and after the Kremlin said they would discuss whether they were ready to team up against Islamic State in Syria.

The Russian Defence Ministry said the attack was carried out by Tupolev-95MS strategic bombers which had taken off from a base on Russian soil and refuelled mid-air before firing at targets on the border between the Hama and Homs provinces.

"The strikes were carried out using high-precision Kh-101 missiles from a distance of about 1,000 kilometres," the ministry said in a statement.

Such missiles were capable of hitting targets at a distance of up to 4,500 kilometres (2,800 miles) and could carry nuclear warheads, the ministry added. The Tupolev-95MS can carry eight such missiles at any one time.

The ministry did not say how many aircraft took part in the attack, but said the strategic bombers had been escorted by Sukhoi-30SM fighters from Russia's air base in Syria's Latakia province.

All of the bombers had returned to their home base in Russia safely, it said.