Discovered and arrested
On 4 August 1944, the Sicherheitspolizei und Sicherheitsdienst raided Prinsengracht 263 and the Secret Annex. The building was searched, and the people in hiding were discovered and arrested. They were interrogated at the Zentralstelle für jüdische Auswanderung and then transferred to the prison on Weteringschans. Jo Kleiman and Victor Kugler, two of the helpers, were also arrested. After interrogation, they were taken to another prison.