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 The United States and Japan cooperate to set up a joint group that will fight against radioactive substances. The group specifically is called upon to work out international techniques to identify a source of leaked nuclear materials.

The group will include scientific experts as well as staff members of the US Federal Bureau of Investigation and Japanese police, a high official of the American administration has told the Kyodo news agency.

Analysts in Washington and Tokyo regard an exact identification of the source of a leaked radioactive substance as an important means to consolidate the nuclear weapons' non-proliferation regime. The joint "nuclear police" of the two countries also intend to carry out concrete operations to cut off smuggling channels and give expert assistance to other countries.