Foreign ministry calls for investigation into blasts at Polish shops in Netherlands

The Polish foreign ministry has called on the Dutch authorities to start an urgent investigation into a mysterious spate of explosions in Polish shops in the Netherlands.

"As a result of the explosions in Polish shops in the Netherlands, we have passed on our expressions of concern to the embassy of this country, and expect a detailed and urgent investigation into the matter, as well an assurance of the safety of Polish citizens," Szymon Szynkowski vel Sęk, the deputy foreign minister, wrote on Twitter.

"Our consular services in the Netherlands are in contact with local authorities."

An explosion on Wednesday morning damaged a Polish supermarket in a town near Amsterdam. No injuries were reported. That blast followed explosions at two Polish shops on Tuesday.

All three stores were called Biedronka, but are not part of the large network of budget stores of the same name in Poland.

Police are investigating the blasts and have not revealed a possible motive.