A Russian journalist and Noble Peace Prize winner has said he and his colleagues are "grieving" over the invasion, BBC reports.

Dmitry Muratov, who edits the Novaya Gazeta newspaper, one of Russia's few remaining independent publications says: "As well as grief, we are experiencing shame."

He accuses Putin of "toying with a nuclear button as if it were a keyring of an expensive car" and asks: "What next - a nuclear strike?"

"I don’t see any other interpretation of Vladimir Putin’s words about 'a weapon of retribution'."

Muratov won the Nobel Peace Prize in 2022 in recognition of his fight for freedom of expression in Russia.

“The next edition of Novaya Gazeta we are going to publish in Russian and Ukrainian, because we do not consider Ukraine our enemy and Ukrainian language - the language of an enemy, and never will," he wrote on Twitter.