On 4 October 1943 , during a secret meeting with top SS officials in the city of Poznań ( Posen ) , and on 6 October 1943 , in a speech to the party elite-the Gau and Reich leaders-Himmler referred explicitly to the `` extermination '' ( German : Ausrottung ) of the Jewish people .
On 4 October 1943 , Himmler spoke of the extermination of the Jewish people during a secret SS meeting in the city of Poznań ( Posen ) .