A verdict of additional embezzlement charges have been laid against Alexey Navalny, who is already serving a two-and-a-half-year sentence.

Navalny appeared in a makeshift court with journalists watching via a video link.
Navalny appeared in a makeshift court with journalists watching via a video link. (AFP)

A Russian court has found jailed Kremlin critic Alexey Navalny guilty on embezzlement charges that could see his prison sentence significantly extended.

The trial on Tuesday concerned additional embezzlement and contempt of court charges and Navalny had been tried at the prison colony outside Moscow where he is already serving a two-and-a-half-year sentence.

"Navalny committed fraud - the theft of property by an organised group," judge Margarita Kotova said.

Navalny appeared in the makeshift court wearing his black prison uniform, with journalists watching via a video link.

He listened closely as judge Kotova read out the verdict, sometimes smiling.

Investigators accused Navalny of stealing for personal use several million dollars' worth of donations that were given to his political organisations.

In the latest criminal case against him, which he has also dismissed as politically-motivated, he could have up to 13 years added to that sentence.

READ MORE: Russia seeks fresh, longer jail term for Kremlin critic Alexey Navalny

Widespread condemnation

Navalny, President Vladimir Putin's most vocal domestic critic, was jailed last year on old fraud charges after surviving a poison attack in 2020 with Novichok nerve agent that he blames on the Kremlin.

Navalny's poisoning with the military-grade nerve agent and arrest on his return from rehabilitation in Germany last year sparked widespread condemnation abroad, as well as sanctions from Western capitals.

After his arrest, Navalny's political organisations across the country were declared "extremist" and shut down, while many key aides fled Russia fearing prosecution.

READ MORE: Russia orders media outlets to delete Navalny-related content

Source: AFP