The deadliest clashes occurred Friday in the central city of Cochabamba, where nine people were killed in a confrontation between Morales backers and the security forces.
Demonstrations have raged since presidential elections on October 20 that saw Morales gain an unconstitutional fourth term amid allegations of irregularities in the vote count.
Morales had previously acknowledged fathering a child with Gabriela Zapata during a two-year affair but claims she had told him the infant died shortly after birth.
By a narrow margin, voters in Bolivia have rejected a constitutional change that would have allowed leftist Evo Morales, South America's longest-sitting president, to run for a fourth term and potentially extend his rule to 2025.
Early returns Monday indicated Bolivian President Evo Morales was facing defeat in a referendum on seeking a fourth term in power, but he sat tight pending results from his rural strongholds.
Bolivian President Evo Morales, the country's first indigenous head of state, marked a record-setting 10 years in office Thursday with an ancient ceremonial rite in the pre-Incan city of Tiahuanaco.
Bolivia announced plans Thursday to build a $300 million nuclear complex, including a research reactor, with Russian technology and help from Argentina.
The amendment stipulates that Morales's re-election in 2014 counts as the first of two consecutive presidential re-elections allowed under the rule change. His first two four-year terms as president do not count because they were won under a previous constitution.
