Summary:
Turkish authorities are investigating a suspicious substance found in an envelope at the Canadian and Belgian consulates in Istanbul.

Full article:
Turkish authorities on Friday were investigating suspicious substances or objects at the Canadian, German and Belgian consulates in Istanbul, officials said. Canadian officials reported receiving a letter containing an unidentified yellow substance Friday, Turkey's semiofficial Anadolu news agency reported. A person who opened the letter was directly exposed to the substance, and six people nearby may have been indirectly exposed, but no one was exhibiting alarming reactions, a representative of Turkey's emergency management agency said. Chemical, radiological and nuclear experts were investigating the substance, and as a precaution were decontaminating the area and the seven people, the agency said. Authorities also are investigating security incidents at the German and Belgian consulates in Istanbul, the agency said without elaborating. The Belgian Consulate said that police were investigating a substance found in an envelope that had been sent there. The incident at the German Consulate involves a suspicious object, according to the German Foreign Office in Berlin. The office didn't elaborate about the object, but it said that Turkish authorities had been notified and that no one at the consulate came into contact with the object.