Vlaardingen

On Wednesday, Dutch authorities arrested a 28-year-old man from the town of Vlaardingen who is suspected of being responsible for the shipments.

Dutch broadcaster NOS, citing an unnamed police spokesperson, reported that the ship was a ferry that turned around and headed back to Vlaardingen near Rotterdam after the discovery.

It said the ship was heading from the Dutch port of Vlaardingen to Felixstowe in England.

Dutch broadcaster NOS, citing an unnamed police spokesperson, reported that the ship was a ferry that turned around and headed back to the port of Vlaardingen near Rotterdam after the discovery.

The ship, the Britannia Seaways, has returned to the port of Vlaardingen and emergency services are on the scene.