Sweden, Norway and Denmark will together contribute around 5 billion Norwegian crowns ($486 million) to a NATO-led initiative to supply Ukraine with US weapons, the Norwegian government said in a statement on Tuesday.

US President Donald Trump said last month the United States would supply weapons to Ukraine, paid for by European allies, but did not indicate how this would be done.

Sweden said its share of the package, which includes Patriot missiles and other air defence equipment, as well as anti-tank munitions, would be worth $275 million.

"Continued supply of this kind of American defence materiel, which Europe can't deliver in sufficient quantity, is decisive for Ukraine's defence capability," Swedish Deputy Prime Minister Ebba Busch told reporters on Tuesday.

NATO Secretary General Mark Rutte said the alliance was grateful to the three Nordic countries for their fast action to fund the package.

NATO has said it would coordinate the NATO Prioritised Ukraine Requirements List (PURL) initiative, which is funded by European members of the alliance and Canada and will be divided into packages worth approximately $500 million.

The Netherlands on Monday was the first country to announce its participation with 500 million euros.

According to the Swedish government website, the Nordic country had donated 92.8 billion Swedish crowns to Ukraine by end of March this year.