The Years of Lead are often considered to have begun with the Hot Autumn strikes starting in 1969; the death of the policeman Antonio Annarumma in November 1969; the Piazza Fontana bombing in December of that year, which killed 17 and was perpetrated by right-wing terrorists in Milan; and the subsequent death that same month of leftist anarchist worker Giuseppe Pinelli while in police custody under suspicion of a crime he did not commit.