The eastern Chinese city of Jinan said it has found the new coronavirus on beef and tripe, and on packaging for these products, from Brazil, New Zealand and Bolivia as China ramps up testing on frozen foods.

The importers were a unit of Guotai International Group and Shanghai Zhongli Development Trade, the Jinan Municipal Health Commission said in a statement on its website.

The entry ports were Shanghai's Yangshan port customs and outer port customs, it said. The statement from the city in Shandong province did not name the companies that shipped the products, according to Reuters.

More than 7,500 people who may have had contact with the contaminated products and other related personnel have tested negative for the virus that causes Covid-19, it said.