Britain's Foreign Secretary Philip Hammond attends a news conference at the Ministry of Foreign Affairs in Nicosia, Cyprus November 19, 2015.

"A quick ending to Russia's operation in Syria is unlikely, Russian Defense Minister Sergei Shoigu told Russia's lower house of parliament," lawmaker Vladmir Gutenev said Wednesday.

Even as the Syrian airspace gets crowded with several major powers declaring war on the Islamic State (IS), which has established a de facto Caliphate in large parts of Iraq and Syria, Russia is all set to deploy its most modern fighter aircraft Su-35 in Syria as part of its own war.

Strikes killed 16 civilians at a market for fuel in Idlib province, the Syrian Observatory for Human Rights said.

Suspected Russian air raids kill 39 civilians in Syria

Another Russia raid hit an ISIS-held village in the countryside of Aleppo, killing more than 20 civilians, activists said.

Adding to the Syrian Qrmy's anti-Daesh effort is Russia's air campaign, which was launched on September 30, when more than fifty Russian warplanes, including Su-24M, Su-25 and Su-34, warplanes, commenced precision air strikes on Daesh targets in Syria at the behest of President Bashar Assad.

Daesh has swept across eastern parts of the Aleppo province from its bastion in Raqqa, fighting both non-extremist rebels and regime troops along the way. But the northwestern province of Idlib is controlled by the fiercely anti-IS Army of Conquest alliance, which includes Al-Qaeda affiliate Al-Nusra Front.

At least 250,000 people have been killed since the Syria conflict began in 2011, according to United Nations figures.