The Haymarket Riot of 1886 took place at Haymarket square on Tuesday May 4th. The group that led the strike was labor radicals. Labor radicals to protested the killing and wounding of several workers by the chicago police during a strike the day before at the McCormick Reaper Works. Toward the end of the Haymarket Square rally, a group of policemen arrived to break up the crowd. As the police got more people, an unknown individual threw a bomb at them. The police and possibly some members of the crowd starting shooting and chaos ensued. Seven police officers and at least one one person died as a result of the violence that day, and anonymous number of other people were injured.