WASHINGTON (Reuters) - The United States said on Wednesday that North Korea had agreed to implement a moratorium on nuclear tests, long-range missile launches and nuclear activities including enrichment at its Yongbyon nuclear complex and to allow U.N. nuclear watchdog inspectors in to ensure compliance.

The State Department said that the United States in return had agreed to finalize details of a proposed food aid package and to take other steps to improve bilateral ties.

"The United States still has profound concerns regarding North Korean behavior across a wide range of areas, but today's announcement reflects important, if limited, progress in addressing some of these," a State Department statement said.

(Reporting By Andrew Quinn; Editing by Vicki Allen)