"In recent field investigations in Syria, Amnesty International has found disturbing new evidence of grave abuses – many of which amount to crimes against humanity and war crimes – committed by the Syrian army in towns and villages around Idlib, and Aleppo, as well as in the Jebel al-Zawiyah and Jebel al-Oustani areas (north-west of Hama) between late February and late May 2012. Towns and villages are being kept under virtual siege by troops who fire indiscriminately into these areas and target those moving in and out of them."