A video of the attack on Novorossiysk with the Sub Sea Baby drone shows a calm port with several ships before a massive explosion kicks up water and debris.

Russian President Vladimir Putin warned Wednesday that Moscow will seek to extend its gains in Ukraine if Kyiv and its Western allies reject the Kremlin's demands in peace talks. U.S. President Donald Trump has unleashed an extensive diplomatic push to end nearly four years of fighting following Russia’s full-scale invasion of Ukraine in February