A least 10 people in Hyogo and Chiba Prefectures have suffered food poisoning after consuming frozen "gyoza" meat and vegetable dumplings from China that contained pesticide, corporate and government officials said Wednesday.

The importer of the products, JT Foods Co., a Tokyo-based subsidiary of Japan Tobacco Inc., has recalled all 23 products made by the Chinese company, the Tokyo Metropolitan Government said.

Police have detected traces of an organophosphate called methamidophos inside the packaging. Methamidophos traces were also detected in samples of the victims' uneaten products, JT Foods said.