A female Russian artist who staged a protest against Moscow's war in Ukraine by replacing supermarket price tags with trenchant calls to stop the conflict is facing eight years in a penal colony after a court hearing on Wednesday.

Alexandra Skochilenko, 33, an artist and musician known to her friends as "Sasha," carried out the protest on March 31 last year, replacing price tags in a supermarket in Russia's second city with five pieces of paper urging an end to the war, which Moscow calls "a special military operation."

Alexander Gladyshev, a state prosecutor, on Wednesday asked a judge in St. Petersburg to jail her for eight years and ban her from using the Internet for three years, according to a statement from St. Petersburg's courts.

The prosecution had previously accused her of committing what it described as a serious crime out of "political hatred towards the Russian Federation" and said that she knew exactly what she was doing.

Skochilenko, who denies the charge, was detained on April 11, 2022, after a shopper complained about her action. She is being tried on the charge of knowingly spreading fake information about the Russian army, an offense punishable in her case by up to 10 years, but which can sometimes lead to a 15-year jail term.

The artist smiled from a courtroom cage on Wednesday as she listened to proceedings despite the prospect of facing a lengthy stint behind bars.

Copies of the imitation price tags which got her into trouble in the first place remain on display on a website maintained by her supporters lobbying for her to be freed.

One of the tags accused the Russian army of bombing a theater in the port city of Mariupol where around 400 people were hiding — a charge Moscow said at the time was false.

Another alleged that Russia was sending conscripts to fight in Ukraine, something it has denied; a third cited alleged Russian casualty figures and accused state TV of not talking about them, and a fourth accused Russian President Vladimir Putin of lying and spoke of "pointless deaths."

A fifth tag read: "My great-grandfather did not take part in the Great Patriotic War (World War Two) for four years in order for Russia to become a fascist state and attack Ukraine."

The Kremlin has said Ukraine's leadership, not it, is the one with fascist tendencies, and has said Russia was forced to send troops into Ukraine to protect Russian-speakers there and stop the creeping expansion of the NATO military alliance which threatened Russia's own national security.

The next hearing in the case will take place on Nov. 13.