Retired Army Lieutenant Dan Choi has been barred from attending a hearing for accused WikiLeaks source Pvt. Bradley Manning, reported.

Choi is the gay rights activist honorably discharged from the Army for announcing two years ago on MSNBC's The Rachel Maddow Show that he's gay, a violation of the military's now-ended “Don't Ask, Don't Tell” policy which barred gay and bisexual troops from serving openly. He went on to become a prominent opponent of the law.

Stress related to the military policy “contributed to mental and emotional problems that should have barred [Manning] from having access to sensitive material,” Manning's lawyers have argued in court.

Choi, wearing his full dress uniform, supported Manning during two days of his preliminary hearing and spoke at a Saturday rally celebrating Manning's 24th birthday.

But on Monday, Choi was detained at the gate for about ten minutes – he was told he could not be dressed in uniform – making him late to the courthouse where the hearing had already begun.

Choi said he was arrested in the courtyard near the courthouse when he called out the name of a sergeant.

“They said I was heckling. I definitely was not heckling,” Choi said. “They used six Mps to pin me down to the ground. They handcuffed me. I still can't feel my right hand. They were so rough they ripped my rank off, the epaulets.”

He was not charged and he was later released. But was told he was barred from attending the remainder of the hearing.