Prince George's County prosecutors said Tuesday that 20-year-old Manuel Joyner-Bell and 23-year-old Michael Hollingsworth were indicted on charges including possession of a destructive device, assault, and reckless endangerment
Both were arrested after a May explosion at the Magic Johnson Theater in Largo.
Authorities say Joyner-Bell confessed to setting off six bottle bombs at five theaters in the Washington, D.C. area this spring.
Officials say sealed soda bottles combining acid and a base inside were detonated, panicking moviegoers and leading to evacuations but causing no serious injuries.
Authorities say Hollingsworth is believed to have been Joyner-Bell's accomplice in the incidents.
Both are being held without bond and also face charges in Virginia.