Ukrainian President Volodymyr Zelenskiy also held talks with a U.S. envoy on Monday on increasing weapons production and arms purchases.

"We are coping, and I have no doubt that we will cope," said Russia's foreign minister, Sergey Lavrov.

NATO Secretary-General Mark Rutte is set to meet President Donald Trump this week on the heels of the U.S. leader announcing plans to sell NATO allies weaponry that they can then pass on to Ukraine.

NATO Secretary General Mark Rutte discusses President Donald Trump's decision to sell weapons to NATO for Ukraine in an interview on 'Special Report.'

President Trump has expressed growing support for NATO, saying that member nations are now "paying their own bills."

During a meeting with President Donald Trump, NATO Secretary-General Mark Rutte spoke about shipping new munitions to NATO.

U.S. Ambassador to NATO Matt Whitaker joins the ‘Brian Kilmeade Show’ to discuss President Donald Trump’s updated strategy for the Russia-Ukraine war and what it could mean for the path to peace.

Donald Trump has said Volodymyr Zelensky should not target Moscow after reportedly privately discussing strikes on the Russian capital with the Ukrainian leader and deliberating whether to send long-range Tomahawk cruise missiles to Ukraine,

President Donald Trump is expected to meet with NATO's secretary-general before announcing a weapons deal with Ukraine to help in its war against Russia. (Scripps News)