Rio de Janeiro school shooting
On the morning of 7 April 2011, a school shooting occurred at the Tasso da Silveira Municipal School, an elementary school in Realengo, a western neighbourhood of Rio de Janeiro, Brazil. Twelve students were killed, and 22 others seriously wounded by 23-year-old Wellington Menezes de Oliveira, a former student who committed the attack with two revolvers.
Source: Wikipedia — Rio de Janeiro school shooting (CC BY-SA 4.0)