The Bolivian government says terrorists are responsible for recent attacks in La Paz and Santa Cruz.
Interior Minister Alfredo Rada blamed what he called an organization of a terrorist nature for a dynamite attack Monday at the office building of a Bolivian trade union, COB, in La Paz.
No one was injured in the early morning explosion.
Two other attacks were reported in Santa Cruz - one at the house of a politician, and another at a hotel where President Evo Morales has stayed.
Rada called the attacks a challenge to Bolivia's democratic society.
Some information for this report was provided by Reuters.