The Islamic State of Iraq and al-Sham (ISIS) killed at least 2,154 people off the battlefield in Syria since the end of June, a Syrian human rights monitor said on Tuesday. The killings of mostly Syrians included deaths by beheading, stoning or gunshots in non-combat situations, the Britain-based Syrian Observatory for Human Rights said. "We continue in our calls to the U.N. Security Council for urgent action to stop the ongoing murder against the sons of the Syrian people despite the deafness of members to the screams of pain of the Syrian people," it said in a statement.