Ukraine's commander in chief said December was the first month that its drones "neutralized" roughly as many Russians as were called up.

The Kremlin has not commented on Trump's Greenland ambitions, with analysts saying they serve a bigger purpose for Moscow.

Russia's FSB said Laurent Vinatier was freed in exchange for Daniil Kasatkin, a Russian who was wanted in the United States for alleged involvement in ransomware attacks.

President Donald Trump approved a Russia sanctions bill backed by Sen. Lindsey Graham as tensions between Moscow and Washington continue.

Russia said that any troops sent to Ukraine by Western governments would be "legitimate combat targets", after Britain and France announced plans to deploy a multinational force there in the event of a ceasefire.

The lightning U.S. operation to capture Venezuelan leader Nicolas Maduro can be seen as both a benefit and a burden for Russian President Vladimir Putin, whose forces botched an attempt to capture Ukraine’s capital and topple its leader at the start of Moscow's invasion nearly four years ago.

Russia formally asked the United States to halt pursuit of Venezuelan oil tanker Marinera after the vessel escaped U.S. Coast Guard interception in the Caribbean.

The U.S. striking Venezuela and capturing its leader has practical implications for China, Russia, Iran and Cuba, and it also sends messages to each nation.