French and Russian air raids were reported Wednesday to have killed 33 ISIS fighters in their Syrian stronghold Raqqa, in a barrage of strikes after the attacks in Paris.
Since Sunday, Russian and French raids have struck arms depots, barracks and other areas in Raqqa city, the extremists' bastion in northern Syria.
The families of foreign fighters in ISIS, which number thousands, had left Raqqa for Mosul, ISIS' relatively "safer" Iraq bastion.
After the attacks in Paris and the downing of the Russian civilian airliner, France and Russia agreed to coordinate their military and security services to fight ISIS.
On Tuesday, President Vladimir Putin instructed his military to work with France "as allies," and agreed in a phone call with French President Francois Hollande on "closer contact and coordination" of operations in Syria.
Late Tuesday, Al-Qaeda's Syria affiliate and key ISIS rival, the Nusra Front, said it had downed two Russian reconnaissance drones over an airbase it controls in northwestern Syria.
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