The official Petra news agency said Sunday that the court charged the 21 for making explosives, possessing weapons and carrying out "acts that led to deaths."
The court's chief prosecutor announced the charges but did not disclose a time for trial of the suspects.
The suspects were arrested in March when Jordan announced a massive operation against the Daesh operatives in the northern city of Ibrid. Officials said at the time that the offensive foiled a major plot for attacks across the kingdom. They said the militant group had planned bomb attacks on "civilian and military sites."
Some 20 people were arrested during the operation while seven Daesh militants were killed.
The operation, however, failed to fully stop threats against Jordan. Earlier this week, seven soldiers were killed as a bomb rocked an area where thousands of Syrian refugees are stranded near the Syrian border. Five Jordanian intelligence officers were also killed three weeks ago after a gunman, who was later arrested, opened fire on people in a Palestinian refugee camp north of the capital.
Jordan is part of the US-led so-called international coalition against Daesh, a group of Western and Middle Eastern countries claiming to be fighting the group in Iraq and Syria.
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