A woman named as Marina Ovsyannikova, who is believed to work for Russian state broadcaster Channel One, interrupted the network's flagship evening news programme to protest against the war in Ukraine.
As news anchor Yekaterina Andreyeva launched into an item about relations with Belarus, Ms Ovsyannikova burst into view, holding a hand-written poster saying "No War" in English.
Below, the poster said in Russian: "Stop the war. Don't believe the propaganda. Here they are lying to you."
It is signed in English: "Russians against the war".
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