Red Brigade letter to Italian official contained suspicious powder ROME, May 31 (UPI) -- Italian police said Friday they were investigating a letter containing a suspicious powder sent to a regional governor by the Red Brigades terrorist group. A person who opened the letter and another person who touched it have been hospitalized as a precautionary measure, ANSA reported. The letter was addressed to Nicola Zingaretti, governor of the Lazio region that includes Rome. It bore a hand-written five-star symbol of the left-wing group, which usually typed its letters. The Red Brigades have been thought defunct since the arrests of their leaders in the late 1980s. The group was responsible for numerous acts of terror in the 1970s and 1980s, including the kidnapping and slaying of Italian Prime Minister Aldo Moro in 1978.