The protests come amid social upheaval across South America, as a wave of unrest over the past two months has battered governments in Chile, Bolivia and Ecuador.
The hunger strikes are part of an intensifying campaign for the release of 139 opposition protesters arrested during the 2018 demonstrations against Ortega.
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.
