Tokyo-based medicine supplier Too Corp. sold medicine illegally to a trading house for export to North Korea, police said Tuesday.

Police filed a report with prosecutors on their probe into Too and its president on suspicion of violating the Pharmaceutical Affairs Law.

According to police, Too, based in Taito Ward, sold 8,100 intravenous-drip bags of amino-acid solution on Nov. 25 to the unnamed trading house, based in Chiyoda Ward, which had provided no prescriptions from medical practitioners. The amino acid solution is used to help patients recover strength after surgery.

Police said they suspect Too sold tens of millions of yen worth of medicine to 12 traders for export to North Korea since April 2005.

Among the importers were North Korean firms blacklisted by Japan to prevent the production of weapons of mass destruction, police said.