Chad's president has ordered two foreign oil companies to leave the central African nation by Sunday.
President Idriss Deby Saturday announced that the government is expelling the U.S. firm Chevron and Malaysia's Petronas. He alleges the companies have not paid their share of taxes.
Comments from Chevron and Petronas were not immediately available.
Chad's primarily agricultural economy has been boosted by foreign investment in the oil sector since 2000. The nation began to export oil in 2004.
Some information for this report was provided by AP and Reuters.