The suspect planned to poison workers with toxic chemical substances, the agency has said Russia’s Federal Security Service (FSB) has said it has foiled a Ukrainian terrorist plot targeting the staff of a Russian defense industry enterprise in the city of Yaroslavl.The suspect is a Russian citizen who was working for Kiev, and who planned to poison workers of the facility with toxic substances, according to a statement from the agency on Tuesday.The man was detained after receiving two containers with “dangerous chemicals” from a cache prepared by the Ukrainian special services, the FSB said. The substances in question can cause potentially fatal respiratory burns, it added.The suspect planned to pour the chemicals into the air ducts of vehicles driven by employees of the defense enterprise, the agency said. READ MORE: Moscow slams Ukraine’s ‘energy terrorism’ “The terrorist’s activities were coordinated from the territory of Ukraine via foreign internet messaging apps,” the FSB stressed.Yaroslavl is located on the Volga River, around 250km (160 miles) northeast of Moscow. The city, which has a population of over 570,000, is the capital of the Yaroslavl Region. Source