During World War II both Japanese troops, especially the Kempeitai, and the officers of the Gestapo,[66] the German secret police, used waterboarding as a method of torture.[67] During the Japanese occupation of Singapore the Double Tenth Incident occurred. This included waterboarding, by the method of binding or holding down the victim on his back, placing a cloth over his mouth and nose, and pouring water onto the cloth. In this version, interrogation continued during the torture, with the interrogators beating the victim if he did not reply and the victim swallowing water if he opened his mouth to answer or breathe. When the victim could ingest no more water, the interrogators would beat or jump on his distended stomach.[68][69][70]