Britain's Home Office says it has released a man held for more than three years under a house-arrest style program used to detain some terrorism suspects.

The man, known only as AE, was detained in May 2006 and classified as threat to national security, but was not charged with any offence.

Under control orders, suspects can be electronically tagged, kept under curfew for up to 16 hours per day and barred from meeting or speaking with others.

The Home Office said Thursday it released the man because it could not comply with a court ruling to disclose intelligence that justified placing suspects under the regime.

Lawyer Mohammed Ayub says the man may sue for damages.

Fourteen other people are now held under control orders.