Seven countries in the European Union have imported eggs infected with Salmonella from Poland.

Dutch authorities have reported the infected eggs to the European Commission, which oversees the quality of food and feed.

The threat is considered to be serious, the Polish PAP news agency has said.

According to Belgium’s Federal Agency for the Safety of the Food Chain, “several shipments of Polish eggs contaminated with Salmonella” have been sent to seven EU countries, including hundreds of restaurants in Belgium, from “various Dutch suppliers”.