A Greek businessman who allegedly spied for the defunct East German security services, according to recently published files, also cooperated with the Soviet Union’s military intelligence, Kathimerini reported yesterday. The paper presented a copy of a letter from the chairman of the German Intelligence Service to the minister assisting Chancellor Helmut Kohl, Dr Lutz G. Stavenhagen, dated Sept. 16, 1991. In response to a query, the letter presented the ties between businessman Socrates Kokkalis and the secret services of the former East Germany. «According to our informant, Kokkalis worked as an unofficial collaborator with the HVA, the East German foreign intelligence service. At the same time, he was active in the service of Russian military intelligence, the GRU,» the letter said. Kokkalis, who has been charged with espionage, denies the charges.