Moscow pounded Ukrainian power infrastructure with drone and missile strikes on Saturday and Kyiv launched a deadly strike of its own on southwestern Russia, a day before talks involving senior European and U.S. officials aimed at ending the war were set to resume.

The Russian submarine was allegedly carrying Kalibr cruise missiles, which Russia has used in devastating strikes on critical infrastructure and military targets across Ukraine. The SBU said the submarine was “put out of action” as a result of the blast. The FT could not independently verify the claim.

Ukrainian navy spokesperson Dmytro Pletenchuk said the operation to hit a submarine, the most difficult target to hit, marked "another turning point" in the naval battle between Ukraine and Russia.

KYIV, Ukraine (AP) — A senior Kremlin official said Friday that Russian police and National Guard will stay on in eastern Ukraine’s Donbas and oversee the industry-rich region, even if a peace settlement ends Russia’s nearly four-year war in Ukraine.