WARSAW, July 17 (Reuters) - Eastern Europe's largest insurer PZU PZU.WA is interested in taking over Slovenia's Triglav ZVTG.LJ , PZU chief executive said on Wednesday, confirming an earlier report. "Triglav is the market leader in Slovenia, with substantial operations on other markets in the region. If there was an opportunity to buy this company, PZU would be interested in such an acquisition," Andrzej Klesyk told Reuters. "As in case of other investments, PZU is interested in acquiring a controlling stake," Klesyk added. Earlier on Wednesday Polish state news agency PAP quoted Slovenian foreign affairs minister Karl Erjavec as saying that Triglav will be put out for sale in the autumn. (Reporting by Pawel Florkiewicz; Writing by Agnieszka Barteczko) ((agnieszka.barteczko@thomsonreuters.com)(+48226539721)(Reuters Messaging: agnieszka.barteczko.reuters.com@thomsonreuters.net)) Keywords: POLAND PZU/