Former Venezuelan President Nicolás Maduro and his wife, Cilia Flores, are set to appear in a New York federal court on Thursday to face revised charges accusing them of overseeing a state-sponsored campaign of repression involving the torture of dozens of people, including three Americans.

Maduro and Flores are expected to plead not guilty to the new charges added to an earlier drug trafficking indictment against them in Manhattan federal court.

The couple were seized from their home in Caracas during a nighttime US military raid in January.

Maduro's lawyer, Barry Pollack, said last week that his client, 63, denies the allegations and “looks forward to his day in court.”

According to the revised indictment, Maduro oversaw a system of violent torture in which victims were beaten, asphyxiated and subjected to electric shocks.

He is also accused of personally recommending torture techniques, receiving updates on the treatment of individual victims and threatening to kill a prisoner's child as a means of psychological torture.

The indictment further alleges that Flores, 69, a former attorney general, helped develop the repressive system and ordered the torture of specific individuals.

Maduro served as Venezuela's president from 2013 until his capture in January. He has also been under investigation for years by the International Criminal Court over alleged crimes against humanity linked to his government's crackdown on political opponents. He has consistently denied wrongdoing.

Earlier this year, Maduro and Flores pleaded not guilty to separate US drug trafficking charges alleging that they conspired to bring large quantities of cocaine into the United States.

Their lawyers have argued that the case should be dismissed on immunity grounds, maintaining that Maduro and Flores were the leader and first lady of a foreign country.

The revised indictment covers alleged torture dating back to 2013, when Maduro succeeded his political mentor, Hugo Chávez, who died of cancer that year.