Venezuelan officials took action against two political dissidents on Wednesday, raiding the home of the country’s ousted attorney general and ordering the arrest of her husband, whom they accused of running an extortion ring.

The former attorney general, Luisa Ortega, was accused by her replacement, Tarek William Saab, of turning her office into “a center of blackmail and extortion.” Mr. Saab, who was appointed by Venezuela’s newly installed, all-powerful Constituent Assembly, also accused Ms. Ortega’s husband, Germán Ferrer, a lawmaker, of extorting millions of dollars from victims with the aid of corrupt prosecutors and stashing the money in foreign bank accounts.

“I want them to explain to me how a lawmaker, who is known to have a modest salary, could open various accounts at the same time,” Mr. Saab said on television.

Mr. Saab was joined by Diosdado Cabello, a top member of the governing party, who called those accused of running the extortion ring “a mafia,” saying they had taken in at least $6 million.