A U.S. citizen accused of attempting to subvert President Robert Mugabe’s government has been released from Zimbabwe’s maximum security jail a day after the High Court ordered her to be freed on bail.

25-year-old Martha O’Donovan was seen leaving prison in a United States embassy vehicle.

O’Donovan and her lawyers did not speak to reporters waiting outside Chikurubi Maximum Prison on the outskirts of Harare.

State prosecutors accuse O’Donovan of writing a Twitter post in October calling 93-year-old Zimbabwe’s President Robert Mugabe a “selfish and sick man”. She denies the accusation.