Meanwhile, Lockhart was arrested by Dzerzhinsky's Cheka and transported under guard to Lubyanka Prison. During a tense interview with a pistol-wielding Cheka officer, he was asked "Do you know the Kaplan woman?" and "Where is Reilly?" When queried about the coup, Lockhart and other British nationals dismissed the mere idea as nonsense. Afterwards, Lockhart was placed in the same holding cell as Fanya Kaplan whom their watchful Chekist jailers hoped might betray some sign of recognizing Lockhart or other British agents. However, while confined together, Kaplan showed no sign of recognition towards Lockhart or anyone else. When it became clear that Kaplan would not implicate any accomplices, she was executed in the Kremlin's Alexander Garden on 3 September 1918, with a bullet to the back of the head. Her corpse was bundled into a rusted iron barrel and set alight. Lockhart was later released and deported in exchange for Maxim Litvinov, an unofficial Soviet attaché in London who had been arrested by the British government as a form of diplomatic reprisal. In stark contrast to Lockhart's good fortune, "imprisonment, torture to compel confession, death were the swift rewards of many who had been implicated" in the prospective coup against Lenin's government. Yelizaveta Otten, Reilly's chief courier "with whom he was romantically involved," was arrested as well as his other mistress Olga Starzheskaya. After interrogation, Starzheskaya was imprisoned for five years. Yet another courier, Mariya Fride, likewise was arrested at Otten's flat with an intelligence communiqué that she was carrying for Reilly.