NSA Sullivan calls on Russian official to 'stop attacking' Ukraine, warns against using chemical weapons

National security adviser Jake Sullivan called for Russia to "stop attacking" Ukrainian cities and towns, warning of "consequences" should Russia use any chemical or biological weapons on Ukraine.

"Mr. Sullivan clearly laid out the United States’ commitment to continue imposing costs on Russia, to support the defense of Ukraine’s sovereignty and territorial integrity, and to reinforce NATO’s eastern flank, in continued full coordination with our Allies and partners," National Security Council spokesperson Emily Horne said after the call.