The proposal of so-called Article 5-like guarantees comes amid marathon talks among special envoy Steve Witkoff, President Donald Trump’s son-in-law and adviser Jared Kushner and Ukrainian and European officials in Berlin as Washington tries to pressure Kyiv into accepting terms that will end the war.

The latest round of talks concluded Monday as Ukraine faces mounting pressure from Washington.

A 1,000-strong "dark fleet" of rogue tankers evading sanctions has become a new target for the U.S. and Ukraine, according to a senior maritime intelligence analyst.

By Steve Holland and Jeff Mason WASHINGTON, Dec 15 (Reuters) - Ukraine would receive security guarantees similar to those provided in Article 5 of the NATO treaty under a proposed peace deal discussed in Berlin,

The NATO issue is what the Kremlin describes as a "root cause" of its war in Ukraine.

Ukraine has relinquished its ambition of joining the NATO military alliance in exchange for Western security guarantees as a compromise to end the war with Russia, President Volodymyr Zelenskyy said ahead of talks with U.S. envoys in Berlin.

The discussions are centred around the peace plan presented by Kyiv to the US last week.

U.S. peace negotiators have told Ukraine during peace talks in Berlin that it must agree to withdraw its forces from the eastern Donetsk region as part of any deal to end the nearly four-year-old war,