TRIANGLE, Va. - Hundreds of people rallied outside a Marine Corps base in Virginia to protest the treatment of an imprisoned Army private suspected of providing classified data to Wikileaks.

About 30 people were arrested Sunday at the rally protesting the pretrial detention of Pfc. Bradley Manning. About two-dozen rallies were held around the world.

Manning is being held in solitary confinement at the Quantico base's brig. He's confined to his cell 23 hours a day and forced to strip naked before bed. The military says the conditions of his detention are justified.

Protesters chanted "Free Bradley Manning" and confronted dozens of police officers in riot gear outside the entrance to the base. A short scuffle ensued. The arrests were made after protesters refused to vacate the intersection at the base entrance.