Nobel Peace Prize winner and Venezuelan opposition leader Maria Corina Machado said Monday that armed men "kidnapped" a close ally shortly after his release by authorities following the capture of former leader Nicolas Maduro.

The country's Public Prosecutor's Office confirmed later that day that former National Assembly Vice President Juan Pablo Guanipa, 61, had been taken back into custody and placed under house arrest, arguing that he had violated the conditions of his release.

Guanipa will be placed under house arrest “for the purpose of protecting the criminal process,” the office said in a statement Monday. The terms of Guanipa’s release have not yet been made public.

Machado has called for Guanipas' immediate release in a post on X.

Guanipa was released on Sunday after more than eight months in prison, along with several prominent members of the opposition.

"I am convinced that our country has completely changed. I am convinced that now it is the duty of all of us to focus on building a free and democratic country," he said a few hours after his release.

Shortly afterwards, Guanipa's son, Ramón Guanipa, reported that the newly elected politician had been "captured and kidnapped" by "a group of approximately 10 unidentified people" in several vehicles in the Los Chorros area, east of the capital.

"We demand immediate proof of his life and his release," Ramón Guanipa wrote in X.