On 15th January 1944 he was arrested and sent to KZ Grini (#9489) the next day where he was not registered as a musician but as a storage worker („Lagerarbeiter“). Without further dates his papers note that he was also imprisoned in Lanaker, for six months in Tarnebu and for the remaining 9 1/2 months in KZ Grini. Furthermore, he was forced to work for the German authorities with a lasting handicap in his left hand. He was released on 30th April 1945.