Two days of talks between President Volodymyr Zelensky and allies have brought some progress on security guarantees, but Russia remains opposed to any foreign forces in Ukraine.

Ukraine has used long-range drones to attack Russian oil platforms as it expands its strikes on the country's energy sector.

A US-backed European peacekeeping force would secure an eventual peace deal, with additional help for Ukraine to build an 800,000-strong peacetime force.

The United States just wrapped up two days of talks with Ukrainian and European negotiators in Berlin, followed by more discussions among leaders in Europe – all of which ended with positive signals about a future peace agreement.

The sweeping peace framework features “Article Five-like” security guarantees, a multibillion-dollar rebuilding plan, progress on tough territorial disputes, and a possible 50/50 split of the

Kyiv has now expressed readiness to drop its bid to join the NATO military alliance if the U.S. and other Western nations give it similar security guarantees.

“For the first time in history, ‘Sub Sea Baby’ underwater drones blew up a Russian submarine of the class 636.3 Varshavyanka … the submarine suffered critical damage and was, in fact, put out of action,” the SBU announced on Telegram.

President Zelenskyy’s comments mark a major shift for Ukraine, which has fought hard to join NATO in recent years.

The U.S. has agreed to provide unspecified security guarantees to Ukraine as part of a peace deal to end Russia's nearly four-year war, and more talks are likely this weekend, U.S. officials said Monday following the latest discussions with Ukrainian President Volodymyr Zelenskyy in Berlin.