An anti-war protester interrupted a live news bulletin on Russia's state TV Channel One on Monday, holding up a sign behind the studio presenter and shouting slogans denouncing the war in Ukraine, Reuters reported.

The sign, in English and Russian, read: "NO WAR. Stop the war. Don't believe propaganda. They are lying to you here." Another phrase, which looked like "Russians against war," was partly obscured.

"Stop the war. No to war," the woman protester could be heard shouting, as the news anchor continued to read from her teleprompter.

The protester could be seen and heard for several seconds before the channel switched to a different report to remove her from the screen.

The woman was named by OVD-Info, an independent protest-monitoring group, and by the head of the Agora human rights group, as Marina Ovsyannikova, an employee of the channel.

Pavel Chikov, head of Agora, said Ovsyannikova had been arrested and taken to a Moscow police station. TASS news agency said she may face charges under a law against discrediting the armed forces, citing a law enforcement source.

In a video recorded before the incident and posted online, a woman who appeared to be Ovsyannikova described herself as a Channel One employee, and said she was ashamed to have worked for years spreading Kremlin propaganda. She said her father was Ukrainian, and her mother—Russian.

"What is happening now in Ukraine is a crime, and Russia is the aggressor country. The responsibility for that aggression lies on the conscience of only one man, and that man is Vladimir Putin," she said.

"Now the whole world has turned away from us and the next 10 generations of our descendants will not wash away the shame of this fratricidal war," she said.

Also, she urged Russians to go out and demonstrate.