El Deber newspaper reported on Friday that law enforcement officers took to streets of the city of Santa Cruz de la Sierra and the capital of Sucre. Photos published by the media outlet showed dozens of alleged police officers rallying.
Meanwhile, Morales gathered Defence Minister Javier Zavaleta and other cabinet ministers at the emergency meeting.
The unrest in Bolivia erupted in the wake of the 20 October presidential election. The electoral authorities said that Morales had secured a new term in the first round, while his rival Carlos Mesa refused to recognize the results of the vote.
The opposition claimed that there were irregularities in the vote-counting process, while Morales accused it of trying to overthrow him.