Following the assassination of Moisei Uritsky and the assassination attempt on Lenin in August 1918, Sverdlov drafted a document that called for "merciless mass terror against all the enemies of the revolution". Under his and Lenin's leadership, the Central Executive Committee adopted Sverdlov's resolution calling for "mass red terror against the bourgeoisie and its agents." During Lenin's recovery Sverdlov moved into Lenin's office in the Kremlin and took over some of Lenin's official obligations. He oversaw the interrogation of Lenin's would-be assassin, Fanny Kaplan, and even moved Kaplan from the Cheka headquarters to be held in a basement room underneath Sverdlov's apartment. Sverdlov's deputy Avanesov gave the order for Kaplan's execution and Sverdlov himself personally ordered that the body be "destroyed without a trace."