Officials re-arrested former Gen Raul Baduel yesterday, saying he had been conspiring to overthrow the government.
Baduel was once a high-ranking member of the administration of late President Hugo Chavez, but later became critical of the socialist party. Baduel was freed from prison in 2015 after serving six years on corruption charges.
On Wednesday, officials arrested substitute lawmaker Gilber Caro from a hardline opposition party on weapons charges.
The arrests come as a fledgling "anti-coup" unit inside the government targets what it calls renewed opposition attempts to destabilise the country.
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The government said Baduel had violated the terms of his parole. Baduel and members of the opposition have always maintained that initial arrest for corruption was a ploy to punish him for speaking out against the government. His son Adolfo Baduel said on Twitter yesterday that his father had not violated any conditions of his parole.
Caro was arrested at a highway toll station after police said they found a gun and explosives in his car. His Popular Will party said the weapons were planted to frame him.
Some in the opposition are pushing for a new round of street protests while others in the factious coalition are advocating attending a round of talks with the government scheduled for today. Opposition leaders have said they won't participate in the meeting unless the government releases more than 100 political prisoners.