"They are attempting to hit what we assess to be critical infrastructure targets out towards the west," Kirby told reporters on Wednesday, listing "electrical power, transportation hubs, that kind of thing."
He said "the flow into the region continues at an incredible pace and the flow of materials from the region into Ukraine also continues every single day."
Kirby added: "And we know that because we talk to the Ukrainians every single day, we know that that material, those weapons, those systems are getting into Ukrainian hands."
"What we are focused on every day ... is to make sure that we are helping Ukraine defend itself by getting them the weapons and the material they need as quickly as possible," Kirby told reporters.
US President Joe Biden at the end of last month asked lawmakers to approve an additional USD 33 billion in military, economic and humanitarian assistance to Ukraine to help it fend off Russian attacks.
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Source: PAP, ukrinform.net, defense.gov