The International Atomic Energy Agency (IAEA) has announced that all suspicions surrounding Seoul's past nuclear activities have been dispelled.

However, in its Thursday report, the U.N. atomic energy agency characterized as "a matter of serious concern" Seoul's failure to report its past nuclear activities in a timely manner in accordance with its Safeguards Agreement.

The report was submitted to the 35 IAEA member states ahead of a Board of Governors meeting set for November 25th.

The agency was quick to add that the experiments in question were experimental and small-scale, and that Seoul had cooperated with the agency in investigating the matter.

A diplomat close to the IAEA said that "there is no indication that these undeclared experiments have continued."

Earlier in August, Seoul admitted to the IAEA that a small group of scientists had conducted secret atomic experiments, separating plutonium in the 1980's and enriching uranium in 2000.

The IAEA report also said it has now discovered that South Korean scientists had also made a compound used for enriching uranium and had conducted experiments in chemical uranium enrichment between 1979 and 1981.