A law enforcement officer escorts Darya Trepova after a court hearing in Saint Petersburg, Russia, on Thursday. Reuters

Hardline military blogger Vladlen Tatarsky died when a miniature statue handed to him as a gift by Darya Trepova exploded in a Saint Petersburg cafe where he was giving a speech last April.

A Saint Petersburg court found Trepova guilty of terrorism and other charges over the attack, sentencing her to almost three decades in a prison colony, the court service said in a statement posted on social media.

Trepova, 26, has denied purposefully killing Tatarsky. She said she was set-up by contacts in Ukraine and thought she was handing Tatarsky a secret listening device, not a bomb.

She was arrested less than 24 hours after the blast.

Prosecutors say she knew the device had been rigged with explosives when she gave it to Tatarsky, whose real name is Maxim Fomin.

In court for the verdict, Trepova sat in a glass box for defendants, wearing a white turtleneck jumper featuring a pattern of large knitted oranges.

Tatarsky was an influential military blogger, one of the most prominent among a group of hardline correspondents that have gained a huge following since Russia launched its offensive.

They publish exclusive information about the campaign from frontline sources and occasionally criticise Moscow's military tactics, pushing for a more aggressive assault.

Born in eastern Ukraine, Tatarsky was a convicted bank robber who escaped from prison to fight with Russian-backed separatists against Ukraine's armed forces when the conflict first broke out in 2014.

He advocated for a much more aggressive military campaign against Ukraine.

Trepova opposed Russia's offensive against Kyiv.

More than 30 other people were injured in the blast, which tore off the facade of the Saint Petersburg cafe.

President Vladimir Putin posthumously bestowed a top award, the Order of Courage, on Tatarsky, citing his "courage and bravery shown during professional duty".

'Sent to death'

In court this week, Trepova again denied knowing she had been recruited to carry out a killing.

She said she "never meant to hurt anyone" and asked other victims and their relatives for forgiveness.

"I still do not plead guilty to the charges, but I accept moral responsibility," she said.

She said her handlers in Ukraine lied to her about the contents of the package, and had "effectively sent a little girl with a bomb to her death."

Kyiv has denied involvement. An aide to President Volodymyr Zelensky said the killing was the result of domestic "infighting" at the time.

The 27-year sentence is one of the longest handed down to dozens of Russians punished for public criticism or crimes conducted in protest at the conflict in Ukraine.

Moscow has accused Ukraine of staging several attacks and killings inside Russia, sometimes also blaming Kyiv's Western allies or the domestic opposition.

The most high-profile was a car bomb that killed Russian nationalist Darya Dugina outside Moscow in 2022.

Kyiv denied involvement, but has appeared to revel in the spate of assassinations and attacks on high-profile backers of Moscow's offensive.

Agence France-Presse