US President Donald Trump has said he wants access to Ukraine’s mineral deposits in exchange for future military aid that Kyiv needs as it continues to defend itself against Russia’s aggression.

Ukraine previously offered U.S. access to its rare earth minerals in an effort to keep the Trump administration engaged in supporting the country militarily in its fight with Russia.

Ukraine has already emphasized that by supporting its war effort, the U.S. could get access to the country’s wealth of critical minerals like lithium and uranium.