Semana Tragica. A Steel factory strike is attacked by police and workers are said to have fired shots. A police officer died, and a few days later the police retaliated, killing five and wounding 20. Workers lashed out with violence against industry and the state. An unrelated maritime strike then shut down the harbors, and police attacked with more violence. The Federacion Obrera Regional Argentina voted for a one-day General Strike in the city. In response, there was a red scare and socialists were hunted down. The police fired on workers rallies, and a group calling itself the Argentine Patriotic League attacked workers, socialists, and attempted to incite pogroms against the city's Jewish population. It is said some Jews pleaded for their lives by claiming they were Italian. Over the month of January, a thousand workers, socialists and Jews were killed, and tens of thousands were imprisoned at various points.