PSP police commissioner Joao Freire told Reuters that "there are four bodies, which were supposedly the result of a shooting, but the causes and details are not yet known", CNN Portugal said.
The police criminal cases agency PJ was at the scene investigating, Freire said.
CNN Portugal said the shooting took place at around 8 a.m. in a poor neighborhood of Setubal called Bairro Azul, and that the gunman committed suicide when police officers arrived on the scene.
RHM/PR