The Mendiola massacre, also called Black Thursday by some Filipino journalists, was an incident that took place in Mendiola Street, San Miguel, Manila, Philippines on January 22, 1987, in which state security forces violently dispersed a farmers' march to Malacañang Palace in protest of the lack of government action on land reform.
Calls for just and comprehensive land reforms to President Corazon Aquino sparked rallies and demonstrations participated by farmers, workers, and students. According to reports, anti-riot personnel guised as civilians, opened fire on unarmed protesters killing at least 12 and injuring 51 protesters.