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In page Fanny Kaplan:

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Despite her refusal to name accomplices, the official announcement of the assassination attempt had Sverdlov blame the Right SRs although it denied any involvement.[1]: 432  Moisei Uritsky, the People's Commissar for Internal Affairs in the Northern Region and the head of the Cheka in Petrograd, had been assassinated on the same day as the attempt on Lenin's life. [2] The Cheka did not find any evidence linking both events,[citation needed] but their occurrence in quick succession appeared significant in the context of the intensifying civil war. The Bolsheviks' reaction was an abrupt escalation in the persecution of their opponents.[3]