Venezuela’s Attorney General Louisa Ortega Diaz says she has been relieved of her new constituent assembly because the government wants to halt her investigations into alleged corruption and human rights abuses.
Louisa Ortega, a supporter who has become a critic of President Nicolas Maduro, has rejected her dismissal.
She will be brought to justice for a “serious violation”, the Supreme Court said.
Meanwhile, one of the opposition leaders, Leopoldo López, has been returned from prison to house arrest.
Leopoldo Lopez was taken from his home on August 1 and spent four days in a military prison.
The South American regional bloc Mercosur has suspended Venezuela indefinitely, having previously placed it under a temporary ban. It says the country will not be readmitted until the constituent assembly is scrapped and all political prisoners are released.
Another opponent of the government, Antonio Ledezma, is also under house arrest again after three days in prison last week.
Antinio Ledesma and Leopoldo López encouraged protests against the constituent assembly, which is dominated by government supporters.
In its first session on August 5, the assembly unanimously voted to remove Louisa Ortega from her post.
Dozens of riot police officers with riot gear prevented her from entering her Caracas office and she was left on a motorcycle amid chaotic scenes.
In a statement issued by the prosecution, Louisa Ortega said President Maduro’s government was waging a “coup against the constitution”.
“I do not recognize the decision”, she said of her dismissal.
“[This is] just a small example of what lies ahead for anyone who dares to oppose this totalitarian form of government. “
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Venezuela’s Supreme Court, loyal to Nicolas Maduro, did not give details of the charges against Louisa Ortega.
Louisa Ortega, who parted ways with the government in March, opposed the opening of the meeting on August 4th, citing allegations of voting fraud.
Tarek William Saab, a supporter of President Nicolas Maduro, was sworn in as her deputy.
The removal of Louisa Ortega was widely expected, but the fact that a decision was made on the first working day of the meeting suggested that the new body could take aggressive action against critics of President Maduro, correspondents said.
Mexico, Peru and Colombia have condemned the dismissal of Louise Ortega.
President Maduro says the constituent assembly is needed to bring peace after months of protests caused by severe economic hardship.
However, the opposition says it is a way for the president to stick to power.
The Constituent Assembly has the ability to rewrite the constitution and can replace the opposition-controlled parliament, the National Assembly.
Julio Borges, speaker of the National Assembly, said the removal of Louisa Ortega was illegal and showed that the country’s institutions were “taken hostage by only one hand, only by one political party” through an “undemocratic mechanism that is completely dictatorial”. .
Although rich in oil, Venezuela is experiencing severe food and drug shortages and inflation of over 700%. Violent demonstrations have killed more than 100 people since April.