Notice to the Army from Mazamari base on the massacre in the Tsiriari valley.
On August 19, 1993, survivors of the Tsiriari Valley massacre alerted the Army at the Mazamari base about the mass killings committed by the PCP-SL the day before. Four community members from Mazamari later arrived to help bury the victims.
On Thursday, August 19, 1993, one day after the massacre perpetrated by Shining Path columns in eight communities of the Tsiriari valley, the villagers who had managed to hide in the bush came down to warn the Army from the Mazamari base about the events that had occurred. The massacre had occurred the day before, on Wednesday, August 18, when three trekking columns of approximately 70 people each entered the communities and killed villagers with bladed weapons, arrows, machetes and hangings. On Friday, August 20, four community members who arrived from Mazamari helped to finish burying the dead. In total, twenty-one people died in the Nomatsiguenga Tahuantinsuyo community, and the entire massacre in the valley left approximately 65 victims according to initial reports.