Tsar Alexander II was assassinated on March 13, 1881, in St. Petersburg when members of the revolutionary organization Narodnaya Volya detonated two bombs as his carriage passed along the Catherine Canal. The first bomb damaged the carriage; when Alexander exited to inspect the scene, a second bomber threw a device at his feet, inflicting fatal injuries. Alexander had signed the Emancipation Manifesto of 1861, freeing approximately 23 million serfs, and had implemented judicial and military reforms. His assassination prompted his successor, Alexander III, to reverse liberalizing policies.