Marchers held banners calling on Russian President Vladimir Putin to keep his “hands off Ukraine," along with slogans such as "Freedom to Ukraine," "Stop War Madness," and "304 days of death and fear."Moscow's closest ally in the Balkans even as it pursues EU membership, Belgrade has condemned Russia's unprovoked invasion but staunchly resisted joining unprecedented Western sanctions on Russia that would curb trade, energy shipments, direct flights, and other links.The December 24 protest was organized by the Russian Democratic Society, a Belgrade-based organization that opposes the Putin government and the invasion of Ukraine.The military said the area had already been under surveillance for days after intelligence reports that militants were using the route to sneak into Pakistan to target civilians and security forces.Ukrainian President Volodymyr Zelenskiy has vowed to “bring back freedom” to the people of Ukraine as he addressed the nation on Christmas Eve, just hours after a fresh round of Russian attacks killed at least 10 people and wounded more than 60 others."