"There are strong indications that the money invested in the construction of the buildings for ROC [Riverstone Oaks Corporation] was public," a source in the case told Lusa.
According to the same source, the towers would have been built with public funds for a company Manuel Vicente and Orlando Veloso, former director of SONIP, Sonangol Imobiliária e Propriedades, one of the subsidiaries on the oil company's privatisation list, were beneficiaries.
"The seizures were the result of an asset investigation related to a criminal case that is underway in the Attorney General's Office [PGR]," he said.
The National Asset Recovery Service warrant said the seizure was made under the Coercive Repatriation and Extended Property Loss Act, the PGR said on Wednesday.
The buildings in question, known as Three Towers, include Tower A Offices, and Tower B and C Residential, located in the urban district of Ingombota, in Luanda, the country's capital.
As trustee, the General Safe of Justice is appointed.