May 15, 1934 - Campo Elías Delgado

The Pozzetto massacre was carried out by the same perpetrator at three locations in eastern Bogotá, Colombia on 4 December 1986. Over the course of seven hours, 29 people were killed and 11 others were injured by 52-year-old Campo Elías Delgado.

Delgado first murdered nine people, including his mother, at two apartment buildings, luring some out by triggering the fire alarm system. Afterwards, he went to the upscale Restaurant Pozzetto, where Delgado opened fire on customers and staff, killing 20 people before being shot dead by police. It is currently the deadliest shooting by a lone gunman in the country's history.

Content sourced from en.wikipedia.org/wiki/Pozzetto massacre under CC BY-SA 4.0.