I don't know if I already posted this case here (if yes, might want to delete this topic.) It is a really obscure case that unfortunately didn't have much luck to attract a news reporter to make more detailed report on this. It consists of a man named Tawar cutting off his own genitals, and then wenting on a rampage.
Text from Amok Wiki:
"Tawar (alias Pak Saleh) was an Indonesian who killed four people and wounded seven others, two of them seriously, in Surabaya, Indonesia on December 25, 1955. He first cut off his own genitals with a pisau belati (a large knife), and then attacked his victims, until he was subdued. After his arrest he told police that he was possessed by the spirit of Tunggul Wulung, whereupon he was brought to hospital."
Tawar - Amok Wiki
Very interesting case. I wonder how much Tunggul Wulung was popular in Indonesia at the time, even though he died many years (1885) before the incident.
Altough I don't know if there were any injuries (obviously there was to the perpetrator) it remembered me of the 2017 Chicago penisless man rampage, where a man cut off his own genitals and charged at police officers. I don't know if I can link this story in this post, since it contains images of the naked man with his penis on image.