Russian opposition politician Alexei Navalny is seen in a still image from video in Germany, in this undated image obtained from social media, Jan. 13, 2021.
FILE - Russian opposition politician Alexey Navalny is seen in an undated still image from video in Germany, Jan. 13, 2021. (Courtesy of Instagram @NAVALNY/Social Media)

MOSCOW - The Kremlin's most prominent opponent, Alexey Navalny, faces two court decisions Saturday that could seal a judge's ruling to jail him for several years, after he returned to Russia following a poisoning attack.

A Moscow court is due to rule on Navalny's appeal of a decision this month to imprison him for nearly three years for violating the terms of a suspended sentence on embezzlement charges.

But if Navalny wins his appeal Saturday, his victory could be short-lived.

Prosecutors in a separate trial have called for him to be fined the equivalent of $13,000 for calling a World War II veteran a "traitor" on Twitter last year, with a verdict also expected Saturday.

They have also asked Navalny, 44, to be jailed on the same fraud conviction, saying his tweet referencing the veteran was posted during the probation period for the suspended sentence.

Backers see bid to silence him

Supporters of the outspoken opposition figure say the rulings and several other cases against him are a pretext to silence his corruption exposes and quash his political ambitions.

He was given the nearly three-year sentence on February 2 for breaching parole terms of an embezzlement conviction while in Germany recovering from the poisoning.

That ruling stemmed from a suspended sentence he was given in 2014 for embezzlement, a ruling the European Court of Human Rights deemed arbitrary.

FILE - Russian President Vladimir Putin chairs a meeting with government members via a videoconference at Novo-Ogaryovo state residence outside Moscow, Russia, Jan. 28, 2021.

The 94-year-old veteran at the center of the defamation trial appeared in a video that was derided by Navalny for promoting constitutional reforms that passed last year and could allow President Vladimir Putin to stay in power until 2036.

A series of theatrical hearings in the case ended Tuesday with Navalny asking if the judge could recommend a recipe for pickles, since it is "pointless to talk about the law" with her.

Putin came under pressure to release Navalny when he was detained upon arrival at a Moscow airport in January.

The arrest sparked large protests across the county that saw more than 10,000 people detained, while the European Union threatened to impose new sanctions on Russia.

Europe's rights court ruled this week that Russia must immediately release Navalny, in a motion swiftly brushed off by the Kremlin.

Navalny's allies believe Russia's noncompliance with the ruling could lead to its expulsion from the Council of Europe and exacerbate a crisis in Moscow's ties with Europe that began with the annexation of Crimea from Ukraine in 2014.

Meeting with EU ministers

EU member Lithuania's foreign ministry said Friday that a group of EU foreign ministers would meet with two top Navalny aides in Brussels on Sunday.

Navalny aides in talks with EU representatives this month urged the bloc to hit people close to Putin with sanctions.

Another Moscow court this week rejected Navalny's appeal of a fine of 3.3 million rubles (36,825 euros, $44,649) that he was ordered to pay a catering company in another defamation lawsuit.

Those charges were levied at the opposition figure by businessman Yevgeny Prigozhin, nicknamed "Putin's chef" because his company Concord catered for the Kremlin.

The 59-year-old businessman, who is under U.S. and European sanctions, has two pending cases against Navalny that will be considered in March.