A judge on Tuesday announced fresh charges against Argentina's ex-president Cristina Kirchner, the latest development in a series of political ructions as the country prepares for mid-term elections this year.

Federal judge Claudio Bonadio brought formal charges against Kirchner, 64, for alleged money laundering in real estate dealings, the Judicial Information Service said in a statement. Kirchner already faces trial in a separate case for alleged financial mismanagement in office.

Source: AFP