Syria detainees hidden, says Human Rights Watch
Syrian state TV says the authorities have released 755 people detained during the nine-month-old uprising against President Bashar al-Assad.
Observers from the Arab League are on the second day of their mission to Syria designed to stop the violent suppression of anti-government protests.
Human Rights Watch director Wenzel Michalski said eyewitness testimonies suggested the authorities had moved many detainees to military sites, with the aim of hiding them from the observers.