This is the 3619th most frequent Portuguese word.
roubados
"Roubados" means "stolen" in English.
In this sentence, 'roubados' is used as a past participle indicating that the documents were subjected to theft.
Os documentos foram roubados pela gangue.
The documents were stolen by the gang.
Here, 'roubados' describes the goods, specifying that they were stolen, linking the theft to the perpetrator mentioned.
Recuperamos os bens roubados pela polícia.
We recovered the goods stolen by the police.
'Roubados' is used to modify 'os dados', attributing the quality of having been stolen to them.