Russia said it will hold security talks with the U.S. and Ukraine in Abu Dhabi on Friday, but warned after a late-night meeting between President Vladimir Putin and three U.S. envoys that a durable peace would not be possible unless territorial issues were resolved, Reuters reported. 

Kremlin aide Yuri Ushakov told reporters the talks, which began shortly before midnight and lasted some four hours, had been "substantive, constructive and very frank".

He said Russian Admiral Igor Kostyukov would head Moscow's team at the three-way security talks, and investment envoy Kirill Dmitriev would meet separately on economic issues with Steve Witkoff, the envoy of President Donald Trump, according to Reuters.