BP has made its largest oil and natural gas discovery in 25 years off the coast of Brazil, it said Monday, in a potential big boost for the British company following its strategic shift away from renewable energy to refocus on fossil fuels.

BP is seeking to bolster oil and gas in its portfolio to regain investor confidence and revive underperforming shares.

Britain's BP announced Monday it made its biggest oil and gas discovery in 25 years off the coast of Brazil, as it shifts back to its fossil fuel business.The discovery comes as a boost to the struggling energy major as it undergoes a major overhaul to focus on its more profitable oil and gas business,