Two Dutch brothers, aged 15 and 17, who were found dead in their Istanbul hotel room in August last year, were killed by phosphine poisoning — a highly toxic pesticide released by aluminium phosphide and typically used for pest control in grain storage facilities. Turkish news agency Demirören Haber Ajansı reports that five suspects, including the hotel manager, a hotel employee, a cleaner, and owners of two pest control companies, have been arrested and await trial. The case mirrors that of a German-Turkish family of four who died in November in the same Istanbul district of Fatih (a central neighbourhood known for its many budget hotels), where phosphine residue was found on towels; the trial of six suspects in that case opened today.