“Extremist groups will continue to exploit the vacuums that are there in Syria to expand their operations, which could include attacks against Russian interests, perhaps even Russian cities. Russia will continue to send troops home in body bags, and will continue to lose resources, perhaps even aircraft,” John Kirby, the State Department's spokesperson, told reporters at Wednesday's press briefing.
If the war continues “more Russian lives will be lost, more Russian aircraft will be shot down,” Kirby said.
In response to the statement that Russia was targeting Nusra Front and terrorists, Kirby said “That’s not what’s happening. They’re hitting hospitals, civilian infrastructure."