British Petroleum (BP) is in advanced talks to sell a group of oilfields in the Gulf of Mexico to Plains Exploration & Production Co. (PXP), Bloomberg reported citing two people with knowledge of the matter.

Plains is discussing a price of about $6 billion and may reach an agreement within days, said one of the people, who spoke on the condition of anonymity because the talks are private.

Scott Dean, a BP spokesman, declined to comment. Hance Myers, a spokesman for Plains Exploration, didn't immediately return phone calls and an e-mail seeking comment, Bloomberg said.