The ultimate timing of the referendum is critical for the opposition.
The move could mean the MUD will have to restart the entire process in the four states where the fraud allegations surfaced.
MUD welcomed the release of the six political prisoners, named as Carlos Melo, filmmakers Andrés Moreno and Marcos Trejo, Coromoto Rodríguez, Pablo Parada and Jean Carlos Ortiz.
The CNE announced last month that the plebiscite could be held no sooner than April of 2017.
Since briefly removing former President Hugo Chávez from power in a coup in 2002, the opposition has taken its campaign against the self-styled socialist regime to the streets and garnering signatures from the electorate to hold a recall referendum.
Fuente original: Venezuela crisis: Venezuela’s opposition stalls Maduro ‘trial’ after six dissidents released | In English | EL PAÍS