The BBC is temporarily suspending the work of all its journalists in Russia.
The move in response to a new law which threatens reporters with prison.
Russia's parliament has passed a law making it an offence to spread "fake" information about the armed forces.
Russian Government officials have refused to label their actions as war, instead insisting on the term "special military operation."
BBC Director-General Tim Davie said: "This legislation appears to criminalise the process of independent journalism. It leaves us no other option than to temporarily suspend the work of all BBC News journalists and their support staff within the Russian Federation while we assess the full implications of this unwelcome development.
"The safety of our staff is paramount and we are not prepared to expose them to the risk of criminal prosecution simply for doing their jobs. I'd like to pay tribute to all of them, for their bravery, determination and professionalism.
"We remain committed to making accurate, independent information available to audiences around the world, including the millions of Russians who use our news services. Our journalists in Ukraine and around the world will continue to report on the invasion of Ukraine."
Independent news stations in Russia have been shut down over the last week as Vladimir Putin's attack on Ukraine intensified.
