Mona al-Batran, wife of Jordanian journalist Alaa Fazaa, told AFP that the head of the military state security court, Colonel Ibrahim Abu Kaud, order the release of her husband.
Fazaa was detained on Wednesday after two former ministers filed a complaint that he had allegedly included their names in a Facebook list of people calling for Prince Hamzah to be reinstated as crown prince.
King Abdullah named his half-brother Hamzah as heir following the death of their father King Hussein in 1999. Five years later, the king appointed his son Prince Hussein as crown prince after relieving Hamzah of his duties.
Fazaa faces another complaint after writing an article on the news website khabarjo.net, claiming senior officials helped prominent businessman Khalid Shahin, who has been sentenced with three others to three years in jail, leave for medical treatment in the United States.
Shahin was spotted in a London restaurant in April, causing an outcry in Jordan.