Bolshevik revolutionary leader Moisei Uritsky is assassinated.

The Bolsheviks, led by Vladimir Lenin, were a radical faction of the Marxist Russian Social Democratic Labour Party (RSDLP) which split with the Mensheviks at the Second Party Congress in 1903. The Bolshevik party, formally established in 1912, seized power in Russia in the October Revolution of 1917, and was later renamed the Russian Communist Party, All-Union Communist Party, and ultimately the Communist Party of the Soviet Union. Its ideology, based on Leninist and later Marxist–Leninist principles, became known as Bolshevism.

Moisei Solomonovich Uritsky, also known by his pen-name Boretsky was a Bolshevik revolutionary leader in Russia. After the October Revolution, he was the head of the Petrograd Cheka from January 1918 until his death on 30 August 1918. Uritsky was assassinated by Leonid Kannegisser, a military cadet, who was executed shortly afterwards.