The Russian military has warned the United States against striking the Syrian army, saying that its air defence weapons in Syria stand ready to fend off any attack from US planes.

The statement underlined high tensions between Moscow and Washington after the collapse of a US-Russia-brokered Syria truce and the Syrian army's offensive on Aleppo backed by Russian warplanes.

Russian Defense Ministry spokesman Maj. Gen. Igor Konashenkov said any US strikes on areas controlled by Syrian President Bashar Assad's government could jeopardise the lives of Russian servicemen.

Maj.-Gen. Igor Konashenkov warned the United States against striking Syrian government forces and issued a thinly-veiled threat to use Russian air defense assets to protect them.

Members of the Army of Mujahedeen attack the Assad regime forces' headquarters during an operation at Rashideen neighborhood

He said Moscow was worried by media reports saying that Washington was considering the possibility of striking Syrian army positions.

'I would recommend our colleagues in Washington to carefully weigh possible consequences of the fulfillment of such plans,' Konashenkov said.

In Washington, State Department spokesman John Kirby said 'We're looking at the full range of options here and those comments notwithstanding, we still have a responsibility as a government to consider all those options.'

'I don't find them (comments like the warning) helpful to moving forward, to reach some sort of diplomatic solution here. But the Russians should speak for themselves and why they're saying that kind of thing,' he said.

Syrians inspect the damage caused by an artillery attack in the al-Jamiliyeh neighbourhood yesterday

Workers from the White Helmets carry a body as they walk through the rubble of a destroyed building after airstrikes hit the Bustan al-Basha neighborhood in Aleppo

Russia said it was unhappy with the US-led coalition's air raid on Syrian army positions near Deir el-Zour that killed 60 Syrian soldiers on September 17, rejecting the explanation from the American side that the attack was a mistake.

Konashenkov said 'we have taken all the necessary measures to prevent any such 'mistakes' with regard to Russian servicemen and military facilities in Syria.'

He said the range of Russia's S-300 and S-400 air defense missile systems deployed to Syria would be a 'surprise' to any country operating its aircraft over the country.

Konashenkov added that the Syrian army also has various Soviet- and Russian-built air defense missile systems, which have undergone modernization over the past year.

Fighting broke out in the government-controlled side of the northern city of Aleppo between regime forces and rebels

A photo provided by the Syrian Civil Defence group known as the White Helmets, shows a body under the ruble of a destroyed building following an airstrike, at Bustan al-Basha neighborhood in Aleppo

Since Russia has launched its air campaign in Syria in support of Assad's forces a year ago, the Russia and the U.S. militaries have maintained contacts to prevent any midair incidents between Russian warplanes and the aircraft from the U.S.-led coalition in the skies over Syria.

Konashenkov warned, however, that the Russian military won't have time to use the hotline if it sees missiles on their way to targets in Syria.

'It must be understood that Russian air defense missile crews will unlikely have time to clarify via the hotline the exact flight program of the missiles or the ownership of their carriers,' he added.

Workers from the White Helmets dig through rubble to remove bodies and look for survivors, after airstrikes hit the Bustan al-Basha neighborhood in Aleppo

Members of the opposition attack the Assad regime forces' headquarters during an operation in the Rashideen neighborhood of Aleppo

In an apparent hint at the U.S. stealth aircraft, he added that any 'dilettante illusions about stealth planes could collide with disappointing realities.'

The Russian military announced Tuesday that a battery of the S-300 air defense missile systems had been sent to Syria to protect a Russian facility in the Syrian port of Tartus and Russian navy ships off the Mediterranean coast.

Tartus is the only naval supply facility Russia has outside the former Soviet Union.

The deployment has added more punch to the Russian military force in Syria, which already includes long-range S-400 missile defense systems and an array of other surface-to-air missiles at the Hemeimeem air base in Syria's coastal province of Latakia.