By 1943 he had ended up in Tehran where British forces were present in large numbers. Imprisoned successively by American forces and British forces, when he managed to get away he made for the Soviet Union in order to seek asylum. Three days after arriving in Moscow he was arrested. He spent the next ten years in a succession of labour camps, and after a further two years in "internal exile" was able to leave the Soviet Union in 1955. He moved to Dresden and resumed his architectural career.