Moscow's statement comes after Washington commits nearly $1.8 billion in military supplies, including Patriot missile defense system, during Ukrainian president's visit

Ukrainian leader presents lawmakers with flag autographed by front-line troops fighting against Russia, thanks 'ordinary Americans' for extensive support provided to Kyiv

Ukrainian leader, on first known trip outside of his country since Russian invasion, says visit shows 'situation under control' due to US support; Biden vows 'united defense'

Leader says first known trip since war began aims to boost country's 'resilience and defense capabilities,' as US lawmakers prepare to vote on $45 billion aid package for Kyiv

Planned DC trip, which could still be called off at last minute over security concerns, would be Ukrainian leader's first known journey abroad since Russia invasion in February

Moscow warns delivery of Patriot air defense systems to Kyiv would be 'another provocative move' by Washington; Ukraine energy provider reports 'significant deficit of electricity'

No reports of injuries; US envoy to Kyiv confirms more military support on the way

Announcement likely to come this week; battery would become the most advanced surface-to-air system West has provided to counter Russia's devastating assaults

Call comes with Russia targeting the pro-Western country's power grid as winter sets in, and after the Ukrainian president emphasized his country 'wants to achieve peace'

Meeting Blinken at summit in Cambodia, Dmytro Kuleba hails military aid from US and others that made recapture of occupied city possible