Chile's former military ruler, General Augusto Pinochet, is to face fresh human rights charges.
Gen Pinochet is currently under house arrest
Judge Victor Montiglio said there was enough evidence to bring him to trial in connection with the disappearance of another three political dissidents.
The judge is probing Gen Pinochet's role in the case known as Operation Colombo, when dozens of opponents were allegedly abducted and murdered.
The former ruler is now facing charges in relation to nine disappearances.
At least 119 people are believed to have been abducted by state forces and later killed in the 1975 secret operation.
However, Judge Montiglio decided not to pursue charges against Gen Pinochet over the disappearance of another four dissidents, because the case had already been heard and dismissed by a military tribunal.
Prosecutor Boris Paredes said would will appeal against the decision, which he described as a "judicial mistake".
Gen Pinochet had his legal immunity stripped in the Operation Colombo case after being found fit to stand trial in September. The indictment is keeping him under house arrest in Santiago.
In the past, the courts have dismissed cases against the former ruler on medical grounds.
However, a recent round of new court-ordered medical tests found that the Gen Pinochet was in good enough health to face criminal charges.
He is also facing separate tax evasion charges in connection with his foreign bank accounts.
More than 3,000 people were killed when Gen Pinochet was in power from 1973 to 1990.