“We’re going to be doing very severe tariffs if we don’t have a deal in 50 days," US President Donald Trump said.

He gave few details on how they would be implemented, but said they would be “secondary tariffs,” meaning they would target Russia's trading partners in an effort to isolate Moscow in the global economy.

“I use trade for a lot of things," he added."But it's great for settling wars.”

Trump and Rutte also unveiled a deal under which the NATO military alliance would buy arms from the United States – including Patriot anti-missile batteries – and then distribute them to Ukraine to help it battle Russia's invasion.

"This is billions of dollars’ worth of military equipment is going to be purchased from the United States, going to NATO... and that's going to be quickly distributed to the battlefield," Trump said.

Rutte, a former Dutch prime minister, said Ukraine would get"massive numbers" of weapons under the deal.

He added Germany, Finland, Canada, Norway, Sweden, the United Kingdom and Denmark would be among the buyers to supply Ukraine. He said “speed is of the essence here,” and said the shipments should make Putin “reconsider” peace negotiations.

While the EU is not allowed under its treaties to buy weapons, individual EU member countries can and are, just as NATO member countries are buying and sending weapons.

The announcements came amid a diplomatic flurry on Monday in Kyiv, where Ukraine's President Volodymyr Zelensky said he hosted US special envoy Keith Kellogg for"productive" talks on air defence and sanctions on Russia.

Rutte also planned to hold talks with US Defense Secretary Hegseth and Secretary of State Marco Rubio as well as members of Congress.

The US president's announcement of the much-needed weapons for Ukraine came after he earlier said he would make a "major statement... on Russia" on Monday.

Trump said on Sunday he would send Patriot air defence missiles to Ukraine, saying they are necessary to defend the country because Russian President Vladimir Putin"talks nice but then he bombs everybody in the evening".

Moscow's offensive on Ukraine has lasted for more than three years, with attacks intensifying this summer and US-led negotiations so far yielding no results to end the fighting.

"We will send them Patriots, which they desperately need," Trump said, without specifying how many weapons he would send to Ukraine.

"I haven't agreed on the number yet, but they're going to have some because they do need protection," he told reporters at Joint Base Andrews on Sunday as he returned from watching the FIFA Club World Cup final in New Jersey.

The administration has U-turned from an announcement earlier this month that it would pause some arms deliveries to Kyiv, instead announcing a new deal which would involve NATO paying the United States for some of the weapons it sends to Ukraine.

"We basically are going to send them various pieces of very sophisticated military and they're going to pay us 100 percent for them," Trump said.

"It'll be business for us," he added.

Trump also repeated that he was"disappointed" in the Russian leader, as he grows increasingly exasperated with Putin.

"Putin really surprised a lot of people. He talks nice and then he bombs everybody in the evening," said Trump.

When he first returned to the White House in January, Trump insisted he could work with the Russian leader to end the war, holding off on hiking sanctions unlike European allies.

But Russia has for months refused a ceasefire proposed by the United States and Kyiv.

Trump has repeatedly voiced displeasure with Putin in recent days, and on Sunday hinted he might finally be ready to toughen sanctions as momentum grows for a deterrent package in Congress.

When asked about whether he would announce any sanctions against Russia, Trump responded:"We're going to see what we will see tomorrow, OK?" and repeated plans to meet with Rutte.

'Sledgehammer'

Earlier on Sunday, US senators touted a bipartisan bill that would arm Trump with"sledgehammer" sanctions to use against Russia.

The sanctions bill would allow Trump"to go after Putin's economy, and all those countries who prop up the Putin war machine", Republican Senator Lindsey Graham told broadcaster CBS news.

It"would give President Trump the ability to impose 500 percent tariffs on any country that helps Russia", said Graham, adding that those could include economies that purchase Russian goods like China, India or Brazil.

"This is truly a sledgehammer available to President Trump to end this war," said Graham.

"Without a doubt, this is exactly the kind of leverage that can bring peace closer and make sure diplomacy is not empty," Zelensky said about the proposed bill in an X post.

Graham and Democratic Senator Richard Blumenthal were also due to meet NATO's Rutte on Monday night.

Blumenthal told CBS news they would also discuss the legally thorny issue of unlocking frozen Russian assets in Europe and the United States for access by Ukraine.

"The $5 billion that the United States has also could be accessed, and I think it's time to do it," said Blumenthal.