The arrested were accused of "terrorism" and were taken to maximum-security prisons, following the extensive protests that broke out after the presidential election in July. At least 28 people died and nearly 200 were injured in the unrest.
The Venezuelan government claims that 103 people were released this week, and an additional 225 in mid-November. According to Foro Penal, a group working for human rights, 190 people have been released so far.
According to human rights groups, the imprisoned have been subjected to abuse and denied proper food and care.
According to the official result announced after the election, the incumbent President Nicolás Maduro's authoritarian regime secured another six years in power, with just over half of the votes. However, the result has been questioned by large parts of the international community.
The opposition has presented its own exit poll, which they claim shows that their candidate, Edmundo Gonzáles Urrutia, actually won with a large majority. He was forced to flee to Spain in September after being threatened by the regime.