"The jihadists were killed in the past 48 hours in the province of Hasakeh, nearly all of them in very intense air strikes by the international coalition which is helping Kurdish forces in the area," said the Syrian Observatory for Human Rights.
In its latest update on the coalition's operations, the US military said in a statement that the alliance's warplanes carried out seven strikes near Hasakeh.
They struck four IS tactical units, destroying seven vehicles, three fighting positions, two armoured vehicles and a shipping container.
"The coalition remains committed to targeting Daesh across Iraq and Syria," he was quoted as saying in the statement.
