According to Jornal de Angola, the announcement was made on Thursday, in Lubango (Huíla), on the margins of the closing of the first annual meeting to review the activities carried out by the Attorney General's Office in the Southern Judiciary Region.
Helder Pitta Gróz stressed that it is not for the PGR to open an investigation, but to make a criminal investigation.
According to the magistrate, quoted by the daily, "the criminal process must exist because there are deaths", and the steps are already taking place "to ascertain the causes of the deaths and everything that is surrounding the incident".
Also on Thursday, the European Union (EU) ambassador to Angola expressed "serious concerns" about the Cafunfo incidents, after meeting with the Minister of Justice and Human Rights, defending an inquiry into the matter.
"Certainly, the European Union is asking for an inquiry into what happened on 30 January in all its complexity and in dialogue with all those who have a role and are intervening in the process," said Jeannette Seppen, at the end of meeting with Francisco Queiroz.
The incidents of Cafunfo, in the province of Lunda Norte, at dawn on 30 January, which the authorities consider an "act of rebellion" and protesters claim to have been a "peaceful act" caused an undetermined number of deaths and injuries.
The police say that about 300 people linked to the Portuguese Protectorate Movement Lunda Tchokwe (MPPLT), which has been defending the autonomy of this region rich in mineral resources for years, tried to invade a police station that day and, in defense, the forces of order and security six people were killed.
The police version is contradicted by MPPLT leaders, opposition political parties and local civil society who speak of more than 20 deaths.