Mysterious Poison Ship?

This morning we passed the Iranian vessel Iran Deyanat. This vessel was seized by pirates off Somalia in October. Nothing particularly unusual about that; the region is a haven for pirates and by one estimate, at least 10 merchant vessels are now in their hands along the Somali coast. Hijacking commercial ships -and their crews - is a lucrative business. Shipping companies and governments have paid millions in ransom for the return of their vessels. At first, it would appear that the Iran Deyanat was just another, unfortunate victim of the pirate trade. But the Iranian vessel, its owners, and cargo appear to be anything but ordinary. After taking control of the ship, the MV Iran Deyanat was taken to Eyl, a small fishing village in northeastern Somalia, where it was secured by up to 100 pirates; 50 ashore and the rest on the ship. But, the hijacking then took a strange turn. Within days, pirates who had boarded the ship developed strange health complications, skin burns and loss of hair. Also that a number of pirates have died.
Anyway; after the vessel was released by the pirates, it finally reached, after a long voyage, the Port of Rotterdam. The Harbour master ordered an investigation and it appeared that there was nothing wrong or special about the vessel and its cargo. Rumours spread by the pirates? The picture shows the so called 'extreme poisonous' cargo discharged by an ordinary crane. Apparently nothing wrong.