BOGOTÁ, Colombia — Venezuela’s dissident attorney general sped away from her headquarters on a motorbike on Saturday as she was being ousted by the country’s new all-powerful assembly, which moved toward a swift consolidation of its power.

“We have asked that she not only be suspended, but removed from her position,” Diosdado Cabello, a powerful member of the assembly, said of the dismissed official, Luisa Ortega. “It was approved unanimously.”

Standing before the group, called the Constituent Assembly, Mr. Cabello proposed that it govern Venezuela for up to two years before presenting the country with a new Constitution that would allow for elections. Members responded with cheers, presumably assenting to the timeline.