The United States and Ukraine are trying to hammer out a natural resources agreement that would give Washington access to Kyiv’s untapped mineral riches in exchange for investments and what Ukraine hopes would be concrete security guarantees.

A copy of the agreement obtained by The New York Times says that the United States “supports Ukraine’s effort to obtain security guarantees needed to establish lasting peace.”

Ukraine said on Wednesday that it had reached a framework agreement with the United States on jointly developing Ukraine’s natural resources including rare earths, critical minerals, oil and gas.