June 25 (Reuters) - KGHM Polska Miedz SA KGH.WA :
* POLAND'S KGHM, ONE OF THE WORLD'S BIGGEST COPPER AND SILVER PRODUCERS, SAYS MAY PAYABLE COPPER PRODUCTION FALLS 6 PERCENT Y/Y TO 53,500 T
* KGHM SAYS FALL MAINLY DUE TO ONGOING MAINTENANCE AT ITS GLOGOW COPPER SMELTER
* KGHM SAYS MAY OUTPUT OF ELECTROLYTIC COPPER IN POLAND FALLS 12 PCT Y/Y TO 40,200 T
* KGHM SAYS MAY SILVER PRODUCTION RISES 21 PCT Y/Y TO 101.5 T
* KGHM SAYS MAY MOLYBDENUM OUTPUT FALLS 37 PCT Y/Y TO 1.6 MLN POUNDS DUE TO LOWER MOLYBDENUM CONTENT IN THE ORE PROCESSED AT CHILEAN SIERRA GORDA MINE
* POLAND'S KGHM SAYS MAY PAYABLE COPPER SALES FALL 11 PCT PERCENT Y/Y TO 49,800 T