NEW YORK — The Blackstone Group LP said Wednesday that General Wesley Clark and Lars Thunell have joined the board of its newly formed power development company Fisterra Energy.

Clark is former NATO Supreme Allied Commander in Europe and Thunell is the former head of the International Finance Corp., which is the financing arm of the World Bank.

Blackstone, a private equity firm, created Fisterra earlier this year to identify and develop independent power projects. It has a focus on projects in Latin America, Europe and the Middle East.

Clark and Thunell will also serve as senior advisers to Blackstone with a focus on the firm's private equity activities in the energy sector.

Blackstone shares were down 17 cents at $21.42 in morning trading.