Thailand imposed a ban on imports of agricultural, meat and dairy products from 12 areas in Japan, Food and Drug Administration secretary-general Pipat Yingseree said on Thursday.

The ban covers fresh vegetables, fruits, meat, eggs and milk from 12 areas -- Fukushima, Gunma, Ibaraki, Tochigi, Miyagi, Yamagata, Niigata, Nagano, Yamanashi, Saitama, Tokyo and Chiba -- effectiveness on April 11, said Pipat.

More vegetables brought into Thailand by Japanese passengers have been found to contaminated with radiation, he said.

Pipat said he would discuss with the Customs Department and the Ministry of Agriculture and Cooperation possible measures to control individual passengers bringing agricultural products into the country, in the interests of food safety.