This puts a further strain on Egypt's relationship with the United States, as Egypt's campaign against the organizations has already angered Washington. Secretary of State Hillary Rodham Clinton told Egypt's foreign minister on Saturday that failing to resolve the dispute may lead to the loss of $1.5 billion in American aid set aside for Egypt this year.
The son of transportation secretary Ray LaHood is among the group going to trial. The group has been banned from leaving the country.
The Associated Press contributed to this report.