The ceasefire’s co-sponsors, Russia and the United States, have traded accusations over the fraying deal, with relations strained even further after the US-led raid killed scores of Syrian soldiers on Saturday. The Syrian Observatory for Human Rights said at least 90 soldiers were killed in the strike. On Sunday, IS said it shot down a Syrian warplane near Deir Ezzor. The base and adjacent government-held neighbourhoods of Deir Ezzor city have been under siege since 2012 and have been dependent on resupply by air. And Russian ambassador Vitaly Churkin accused the US of violating agreements that it would not target Syrian army positions.

Source: Hindustan Times September 18, 2016 12:45 UTC