A Russian court on Wednesday sentenced a journalist to seven years in prison for criticising the Ukraine offensive in social media posts.

Roman Ivanov, 51, was found guilty of spreading "false information" about Russia's armed forces and punished under Moscow's strict military censorship laws.

Moscow has used laws against "discrediting" the armed forces or publishing "false information" to stamp out public criticism of its full-scale military offensive on Ukraine.

"Peace and freedom," Ivanov shouted as he left the courtroom after the sentence.

"We're with you. You are not alone," his supporters shouted and applauded, AFP journalists at the courtroom saw.

In social media posts published in 2022 on the Telegram and VKontake social media sites, Ivanov had criticised Russia's military offensive in Ukraine and its actions in the Ukrainian city of Bucha.

He was arrested last year and pleaded not guilty.

In a final statement to the court at a previous hearing he said: "Journalism no longer exists in Russia."

"We must ask ourselves why we are sowing suffering and unhappiness all around us, why our country has turned into an avalanche of suffering and unhappiness", he added.

Ivanov used to work for a local state-run TV channel but was fired in 2021 after reporting on alleged corruption, electoral fraud and ecological problems in Korolyov, a town to the northeast of Moscow.

Speaking outside the courtroom after the verdict on Wednesday, Ivanov's mother said she believed the case against him had been ordered by local authorities as retribution for his reporting.

"What's in front of him has been completely fabricated," Alla Ivanova said.

"I will continue to fight," she added, speaking through tears.

"I love my son and I'm proud of him. I'm proud that he fought for people, helped people."