Ukrainian underwater drones struck a Russian submarine for the first time on Monday, causing critical damage to the vessel and making it the first publicly acknowledged use of the new class of Ukraini...

Ukraine’s SBU domestic security service said on Monday that Kyiv’s forces struck a Russian submarine in the port of Novorossiysk, causing critical damage to the vessel.

In a statement on Monday, Ukraine’s Security Service (SBU) said it conducted a “unique special operation" to strike a Russian Kilo-class submarine at the Black Sea port of Novorossiysk.

The United States, Ukraine and Europe have agreed on a NATO-like guarantee for the future security of Ukraine, two U.S. officials told reporters on Monday after negotiations over a peace agreement tha...

The latest round of talks between Ukrainian president Volodymyr Zelensky and US envoys have ended as they and European allies seek an end to Russia’s nearly four-year war.

But Ukraine continued to reject the U.S. push for ceding territory to Russia.