After seeing Ziamber II posts, I got inspired and decided to share those two cases from my favorite country, Angola.
Unknown mental patient - killed six people and seriously wounded five others at the Vila do Bailundo Hospital in Bailundo, Angola with a machete during the night April 2, 1960
Jorge José - killed five people and wounded six others in the locality of Kainja, municipality of Uku Seles, province of Kwanza-Sul, Angola on June 2, 2009, The 25-year-old, who was apparently under influence of drugs, attacked his victims with a machete.
Interesting is that the kill and injury count is eerily similar (6 kills, 5 injuries (Bailundo), 5 kills, 6 injuries (José)).