The United States assumes that Russia may attempt another spring offensive, possibly in other directions, and is ready to continue providing Ukraine with "everything it needs" for defense, Spokesman for the U.S. National Security Council John Kirby has said.

"The coming weeks would be 'critical' in the war and the US expected Russian President Vladimir Putin would 'try to mount another offensive and maybe along many different vectors," Kirby told CNN.

"We have got to make sure that we are doing everything we can to make sure Ukraine is ready for that," he said.

According to Kirby, the United States wants to ensure Ukrainians can defend themselves against any renewed Russian offensive while also having flexibility to "conduct offensive operations of their own at a time and place and a size and a scale of their choosing."

"We're going do is stay focused on making sure President Zelenskyy has what he needs, wherever he chooses to fight. That means intelligence. That means support. That means weapons. That means capabilities. That's what we're going to be focused on," Kirby said.