Poland and the Baltic states also withdrew from the Ottawa Convention despite pleas from some leaders to maintain decorum in the face of Russian aggression.

President Donald Trump told NBC News in a Thursday night interview that NATO will foot the bill for U.S.-supplied Patriot missile shipments to Ukraine.

Russia has criticised the planned deployment of longer-range U.S. missiles in Germany as a serious threat to its national security.

Romania has said it will acquire the Iron Dome missile defense system used by Israel to protect the NATO country from short-range missiles. Defense minister Ionuț Moșteanu told Romanian television that a deal would be signed this year with manufacturer Rafael "to defend our cities."

Trump, however, has long been a NATO skeptic. He has excoriated NATO as a financial drain on the United States, and it was reported that several times during his first term he even privately threatened to withdraw from it.

President Trump said late Thursday that a deal was struck with NATO to send weapons to Ukraine, with the military alliance bearing the brunt of the cost.  “We’re sending weapons to NATO, and NATO

President Trump announces arrangement where NATO pays for US weapons sent to Ukraine, as Russian strikes intensify across Ukraine, including an attack on a maternity hospital.

NATO is deploying F-35s over Poland to deter Russian threats near Ukraine's border. The mission is the first F-35 operation there under NATO command.