A peace plan proposed by U.S. Special Envoy Steve Witkoff reportedly includes the offer of a “robust security guarantee” for Ukraine if Kyiv agrees to drop its ambition for NATO membership.

According to Reuters, which said it had seen the Witkoff document, European allies and other friendly states would act as Ukraine’s security guarantors. The report did not say the U.S. would be one of those guarantors.

Kyiv has long voiced concerns about guaranteeing its security from future Russian aggression and to deter and more invasions by Moscow.

Ukraine’s European allies led by the U.K. and France—both NATO members—are putting together what they call a “coalition of the willing” to send peacekeeping troops there once the fighting stops.

Russia has rejected such proposals, saying troops in Ukraine from NATO member states would be a threat to its security.

This is developing story and more information will be added soon.