MOSCOW — Russian President Vladimir Putin met with President Donald Trump ’s special envoy tasked with negotiating an end to Russia’s war in Ukraine, as well as his son-in-law, for a "constructive" five-hour meeting Tuesday, but more work needs to be done, Yuri Ushakov, a foreign policy adviser to Putin, said in a video the Kremlin posted online.

U.K. citizen Ross David Cutmore detained in Ukraine for allegedly working with Russian FSB to plan assassinations and gather military intelligence.

Putin has repeatedly falsely claimed to capture Ukrainian cities prematurely.

Oil prices rose on geopolitical concerns after high-level talks between the U.S. and Russia failed to yield any significant progress in ending the war in Ukraine.

Russian President Vladimir Putin has ratcheted up tensions with Europe, warning that if the bloc starts a war with Russia, Moscow is ready.

Several top Ukrainian officials were expected to be in Brussels on Wednesday.

Belgium on Wednesday rejected a plan to use frozen Russian assets to help prop up Ukraine’s economy and war effort over the next two years, saying that the scheme poses major financial and legal risks.

In an exclusive interview, Mikhail Khodorkovsky says Vladimir Putin has abandoned his previous pragmatism — and reveals the U.S. oil company he nearly merged Yukos with.