Investigators for Human Rights Council attribute alleged rights abuses to Assad regime, Russian forces, al-Qaeda-linked fighters and Turkish-backed rebels

State TV says helicopter was hit by a 'hostile missile' in Aleppo countryside; Turkish-backed rebels claim responsibility

Deployment part of cease-fire brokered by Moscow to stop Turkish military offensive against Kurds

War monitor reports heavy fighting near border town of Ras al-Ayn after Kurdish fighters forced to retreat by US military withdrawal

Regime troops move toward border after reaching deal with Kurds to help counter Turkish military offensive; Erdogan signals imminent assault on Manbij

In rare display of Moscow's military operations in war-torn country, regime troops show off new weapons skills, perform mine clearing exercises and carry out mock assaults

State news agency also reports Syrian forces found Israeli-made vehicles and materiel in village near Quneitra