The Bloody May Day (Turkish: Kanlı 1 Mayıs, lit. 'Bloody 1 May' or 1 Mayıs Katliamı, '1 May Massacre') was an attack on leftist demonstrators on 1 May 1977 (International Workers' Day) in Taksim Square, Istanbul, Turkey. Casualty figures vary between 31 and 36 people killed with 126 to 220 injured. Over 500 demonstrators were later detained by the security forces, and 98 were indicted. None of the perpetrators were caught, although suspicion soon fell on the Counter-Guerrilla and associated right-wing groups. The massacre was part of the wave of political violence in Turkey in the late 1970s.
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