Ukraine fears increased Russian aggression after US halt of weapons supply.
Kyiv has warned that an interruption of US weapons shipments will encourage Russia to prolong the war in Ukraine, now in its fourth year.
On Tuesday the White House said it had cut off some weapons deliveries to Ukraine.
According to American broadcaster NBC, the weapons being delayed could include Patriot interceptors, Howitzer munitions, missiles and grenade launchers.
The Kremlin, for its part, welcomed news of the reduction in weapons shipments, saying reducing the flow of weapons to Kyiv will help end the conflict faster.
"The fewer the number of weapons that are delivered to Ukraine, the closer the end of the special military operation," Kremlin spokesman Dmitry Peskov told reporters.
Moscow also says it has seized territory in the south-eastern region of Dnipropetrovsk - a claim denied by the Ukrainian military. »