MMX Announces New Investor Relations Managers

RIO DE JANEIRO, BRAZIL--(Marketwire - June 23, 2008) - MMX Mineração e Metálicos S.A. (BOVESPA: MMXM3) (TSX: XMM), in line with the company's partial split-up approved in the Extraordinary Shareholders' Meeting held on June 19, 2008 and to better serve its shareholders and investors, hereby announces that:

--  Marília Botelho became MMX's Investor Relations Manager as of today.
    Marília graduated in International Trade and holds an MBA, Finance from
    IBMEC, Rio de Janeiro. She worked for 15 years in Vale's Corporate Finance
    Department in Brazil and in several projects abroad, and has been MMX's
    Planning Manager since December 2007.
    
--  Elizabeth Cruz, MMX's IR Manager since July 2006, is now responsible
    for the Investor Relations department of Iron X Mineração S.A., a company
    created from the split-up of MMX's assets and whose sale to Anglo American
    is currently being concluded.
    
--  Antonio Castello Branco is LLX Logística S.A.'s Investor Relations
    Manager. He graduated in production engineering at UFRJ and holds an MBA in
    Finance from New York University and from Coppead. Antonio began his career
    in the financial market, having joined Vale in 1997, where he was
    responsible for the Corporate Finance and Treasury Departments, and for
    Valepontocom's Finance Department. Subsequently, he acted as Planning and
    Finance Officer of Rio Doce Manganês until 2006. In 2007, he joined LLX as
    IR and Budget Manager.