The dead man, aged 28, and the injured man, 32, were both being held on remand - the former for drug trafficking and the latter for homicide, the DGRSP said in a statement. The survivor, who had injuries to his neck, was taken to a hospital in Lisbon.


Police are on site investigating the incident, while the DGRSP has itself opened an internal inquiry into it, overseen by a public prosecutor.


Sources told Lusa that there are suspicions that the incident involved a murder followed by a suicide attempt.