LIMA, July 2 (Xinhua) -- Bolivia's Interior Minister Alfredo Rada has accused the U.S. ambassador to his country of trying to unite the Bolivian opposition against the government before the nationwide recall referendum on Aug. 10.

    Bolivians will vote at the referendum to decide whether President Evo Morales, Vice President Alvaro Garcia and eight governors will continue in office.

    According to reports reaching here from La Paz, the administrative capital of Bolivia, Rada expressed hope that U.S. Ambassador Philip Goldberg would not intervene again in Bolivian political affairs, but rather concentrate on fulfilling his diplomatic role.

    Goldberg returns to "be the political tool of an opposition that doesn't know what to do in relation with the referendum," said Rada.

    Bolivian President Evo Morales called the referendum after the four provinces of Santa Cruz, Tarija, Pando and Beni voted for increased autonomy from the central government this year.

    The governor of the department of Beni met with Goldberg Tuesday, and U.S. embassy officials also met with the founder of the opposition National Unity party, Samuel Doria, Rada said.

    The United States called Goldberg to Washington on June 16 to discuss security matters following violent protests in front of the country's embassy in La Paz on June 9.

    Goldberg comes back to Bolivia with a mission to seek dialogue with the country's leadership, the U.S. government has said.