Presidents of Russia

Moscow on Thursday accused the US of masterminding a drone attack on the Kremlin, a charge denied by Washington, and said Ukrainian sabotage on Russian territory had reached "unprecedented momentum".

Moscow said President Vladimir Putin was working from the Kremlin the day after the attack, which it said was a Ukrainian attempt to kill him.

Day 435 of the invasion of Ukraine. Summary of key events in the last 24 hours:

The Kremlin said on Wednesday it shot down two drones launched by Ukraine and accused Kiev of attempting to kill Russian President Vladimir Putin.

It would be an "unfortunate by-product" if Russia and China became closer as a result of the war, United States Ambassador to Greece George Tsunis said of the Russian invasion of Ukraine during a conversation with the editor of Kathimerini English Edition, Tom Ellis, on the second day of the Delphi Economic Forum, during which he also stressed the country's significance to the US and NATO.

"Bulgaria will arrest Russian President Vladimir Putin if for some reason he ends up in our country", announced Chief Prosecutor Ivan Geshev in an interview with the Faktor.bg.

Day 420 of the invasion of Ukraine. Summary of key events in the last 24 hours:

Russian President Vladimir Putin visited headquarters of the Russian troops fighting in Ukraine early Tuesday, his second trip to the Russian-held territories there since March.

U.S. Secretary of State Antony Blinken and UN Secretary General Antonio Guterres reiterated today the importance of preserving the principles of sovereignty and territorial integrity, in light of Russia's war of aggression against Ukraine, the State Department announced.

Lukashenko began a two-day visit to Moscow

Their soldiers battling and dying across muddy trenches, ruined towns and sprawling minefields, Russia and Ukraine have stepped up recruitment drives to bolster their badly depleted militaries, in another sign that both sides are steeling themselves for a long war.

The Kremlin said on Thursday that no decision had been taken on whether President Vladimir Putin will visit Turkey in April for the inauguration of a reactor built by Russia's state nuclear energy company.

Turkish President Tayyip Erdogan said on Wednesday it was possible Putin could visit for the ceremony on April 27. [Reuters]