Russian ambassador pelted with red substance during country's Victory Day celebrations

• Protesters hit Russia's ambassador to Poland with a red substance as he marked Russia's Victory Day.
• Some protesters reportedly had Ukrainian flags and shouted "murderer" at him.

Russia's ambassador to Poland was pelted with red substance by protesters as he tried to commemorate Russia's Victory Day.

Sergey Andreev was going to lay flowers at the Soviet Military Cemetery in Warsaw, Poland, on Monday when he was met by the protesters opposing Russia's invasion of Ukraine, Reuters reported

Some protesters carried Ukrainian flags and shouted "fascist" and "murderer" at him, ABC News reported.

Russia's state-run Ria news agency published video of the protest.

Russian Foreign Ministry Spokeswoman Maria Zakharova said that the protest served to "confirm what is already clear: The West has set a course to revive Nazism." Russia has repeatedly claimed without any basis that Ukraine has been taken over by Nazis, and used that as an excuse to invade the country.

Pawel Zalewski, a Polish member of parliament, said after the protest that his country should prepare for Russian retaliation against Polish diplomats in Moscow.

It is not clear who the protesters were.

Russia commemorates "Victory Day" on May 9 every year, to mark the Soviet Union's defeat of Nazi Germany in 1945.

The date is usually marked with a huge military parade in front of the Kremlin.

Russian President Vladimir Putin spoke at this year's event though he did not directly mention Ukraine. As Insider's Bill Bostock reported, Western officials had expected that he would use the event to ramp up his war with Ukraine, but that did not happen.