Citing a report by Petrobras, Brazil's Environment Minister, Ricardo Salles, believes the thick crude that has been mysteriously arriving on his nation's beaches is "very likely from Venezuela."
Brazilian authorities have been investigating oil of unclear origin washing up across beaches of nine northeastern states for more than a month.
Brazil's President, Jair Bolsonaro, said, "it could be something criminal, it could be an accidental spill, it could also be a ship that sank. It is complex. We have on our radar screen a country that could be the origin of the oil."