An aerial view is seen of oil that seeped off the coast of Rio de Janeiro, caused by a well drilled by Chevron at Frade, on the water in Campos Basin in Rio de Janeiro state November 18, 2011. Brazilian federal police have opened a probe into US oil giant Chevron over alleged pollution linked to an oil spill at its offshore Frade project, local media reported. Brazil's energy regulator ANP said oil seeps off the coast of Rio de Janeiro were caused by a well drilled by Chevron at Frade, where the company has estimated that as much as 650 barrels had been released causing a "sheen" on the sea surface. In an e-mailed response to Reuters' questions about the investigation, a Chevron spokesman said the company "continues to fully inform and cooperate with Brazilian government agencies as part of the company's response efforts." [Photo/Agencies]