VANCOUVER, Sept. 4, 2012 /PRNewswire/ - Northern Dynasty Minerals Ltd. ("Northern Dynasty" or the "Company") (TSX: NDM; NYSE MKT: NAK) is responding to contact from the NYSE Market Exchange regarding recent increased trading activity in the Company's stock. The Company confirms there are no material undisclosed corporate developments. The Company does not otherwise comment on market activity. Ronald W. ThiessenPresident & CEO . SOURCE Northern Dynasty Minerals Ltd.