Two new reports are warning of massive human rights violations in secret prisons run by the Syrian government and by Islamist rebels. United Nations investigators say Syrian activists and other citizens have disappeared in a “widespread campaign of terror against the civilian population” by the regime of Bashar al-Assad. The United Nations says the enforced disappearances of Syrian civilians amount to a crime against humanity. A separate study by Amnesty International says the al-Qaeda-linked Islamic State in Iraq and the Levant is operating at least seven secret prisons in rebel-controlled areas of northern Syria. Amnesty says prisoners are facing “a shocking catalogue of abuses” including “torture, flogging, and summary killings.” The rebels’ prisoners include children as young as eight years old.