in april 1923 conradi attempted an assassination of bolshevik foreign affairs commisar georgy chicherin while he visited germany, but unable to find him he returned to geneva. finding out about the upcoming conference, he planned another assassination. vatslav vorovsky, ivan ariens and maxim divilkovsky were delegates of the bolshevik government to the 1923 conference of lausanne. on 10 may 1923 conradi and his companion arkady polunin (аркадий павлович полунин) entered the restaurant of the hotel cecil, shooting the bolshevik delegation. vorovsky was killed at the scene, and ariens and divilkovsky were wounded but survived.