The U.S. and NATO are working on a novel approach to supply Ukraine with weapons using funds from NATO countries to pay for the purchase or transfer of U.S. arms, according to three sources familiar with the matter.

The mechanism is part of President Trump’s plan to funnel more American equipment to Kyiv for its fight against Russia.

The reported mechanism will allow Kyiv to prioritize weaponry needs under its Priority Ukraine Requirements List, Reuters reported, with arms being delivered in tranches of roughly $500 million. Spearheaded by alliance Secretary General Mark Rutte,