Police in Russia arrest thousands in crackdown on anti-war protesters since invasion began

Police detained more than 2,000 people at anti-war protests in 48 cities across Russia on Sunday, a protest monitoring group said, as people defied authorities to show their anger over Russia's invasion of Ukraine. Since the invasion began Thursday, more than 5,500 people have been detained at various anti-war protests, according to the OVD-Info monitor, which has documented crackdowns on Russia's opposition for years.In Moscow, riot police often outnumbered protesters, some carrying handwritten placards with peace signs and anti-war slogans in Russian and Ukrainian. Some wore masks with the word "Enough" on the front.

A demonstrator wearing a face mask with a 'No to war' inscription stands in front of a line of police officers during a protest in central Saint Petersburg on Sunday. (Sergei Mikhailichenko/AFP via Getty Images) A reporter for the independent television channel Dozhd was arrested during the protests despite showing his accreditation to police and wearing a press vest. Outside the upmarket Gostiny Dvor department store in downtown Saint Petersburg, hundreds of anti-war protesters stood together, linking arms and chanting.

On the streets of Moscow, protesters made their voices heard against the Russian invasion of Ukraine on Sunday. (Evgenia Novozhenina/Reuters) Sunday's protests coincided with the seventh anniversary of the murder of opposition politician Boris Nemtsov. In Moscow, some of the arrests took place at an improvised memorial just outside the Kremlin at the site where Nemtsov was shot, a Reuters witness said. "No to war," shouted one of the demonstrators as he was being dragged away by the police.

Police officers detain a demonstrator in central Saint Petersburg on Sunday. Outside the upmarket Gostiny Dvor downtown department store, hundreds stood together, linking arms and chanting. (Sergei Mikhailichenko/AFP via Getty Images) Nemtsov was a prominent critic of President Vladimir Putin, Russia's annexation of Crimea in 2014 and Moscow's support for pro-Russian separatists in Ukraine that ultimately led to what Putin labels a "special operation" to protect the two separatist regions although his troops are fighting in wider Ukraine. Ukraine's Western allies have slapped unprecedented sanctions in response to Russia's land, sea and air invasion. Putin ordered his military command to put nuclear-armed forces on high alert on Sunday as Ukrainian fighters defending the city of Kharkiv said they had repelled an attack by invading Russian troops. Tens of thousands of people across Europe marched against Russia's invasion on Sunday, with 100,000 protesting in Berlin, in solidarity with Ukraine. PHOTOS | People across the globe protest in solidarity with Ukraine: