Paraguayan authorities were searching Friday for more bodies at the former home of late dictator Alfredo Stroessner, where the remains of three people were unearthed last week, as police investigate whether they belong to some of the 423 people killed or forcibly disappeared under his regime.
Squatters discovered three human skulls and other bones when they dug up a bathroom floor after occupying the sprawling property earlier this month.
The 30-hectare (74-acre) hillside property, on farmland near Ciudad del Este in Paraguay's tri-border area with Brazil and Argentina, had been abandoned for years.
Dozens of people were excavating the house and surrounding foundations on Friday under the direction of police, hacking at thick concrete using pickaxes and crowbars.
Stroessner ruled Paraguay with an iron fist from 1954 to 1989 -- South America's longest dictatorship.
The occupants said Friday they had discovered more bones at the end of an underground tunnel at the property.
"We discovered a tunnel filled with rubble. We're told it's about 100 meters long and ends in a pit, where there are more bones," said Rafael Esquivel, a former municipal official who is a spokesman for the occupants.