Jordan's former royal court chief and a minor royal have gone on trial at a military court on charges of sedition and incitement against the monarchy.
Bassem Awadallah and Sharif Hassan bin Zaid were detained in early April, when former Crown Prince Hamzah was placed under house arrest over an alleged plot to destabilise the nation.
The two men pleaded not guilty in court on Monday, one of their lawyers said.
Prince Hamzah, the half-brother of King Abdullah, is not facing any charges.
The king said he had decided to deal with his case "within the framework of the Hashemite family" after he publicly pledged his allegiance.
However, an indictment filed against Mr Awadallah and Sharif Hassan accuses the prince of having been "determined to satisfy his personal ambition to rule".
