Turkey beefed up its military positions in Syria’s rebel bastion of Idlib yesterday as the clock ticked down on a mid-October deadline to remove militants from the area.

The Syrian state will recover Idlib through war or peaceful means, a minister was quoted as saying on Tuesday, pointing to the government's determination to defeat rebels there despite a Russian-Turkish deal that halted an expected army offensive.

Tens of thousands of mourners attended a funeral yesterday in the southwestern Iranian city of Ahvaz for soldiers and civilians killed in an attack on a military parade.

Russia will supply an S-300 surface-to-air missile system to Syria within two weeks, Defence Minister Sergei Shoigu said on Monday, a week after Russia blamed Israel for indirectly causing the downing of a Russian military plane in Syria.

Turkey will take action east of the Euphrates river in Syria and impose secure zones as it has done in the northwest of the country, President Tayyip Erdogan said in comments broadcast on Turkish media on Monday.

Thousands of people packed the streets of the southwestern Iranian city of Ahvaz on Monday to mourn the victims of an attack on a military parade that killed 25 people, including 12 members of the elite Revolutionary Guards.

Iran’s elite Revolutionary Guards vowed yesterday to exact “deadly and unforgettable” vengeance for an attack on a military parade that killed 25 people, including 12 of their comrades.

More than 3,000 civilians have been killed in US-led coalition air strikes against the Islamic State group in Syria since they began four years ago, a monitor said on Sunday.

Saturday's storm caused water levels in some areas to rise as much as 1.7 metres, as bridges and roads were damaged in record rains.

The Washington-led alliance puts the toll at just over 1,000 civilians in both Syria and neighbouring Iraq, and says it does all it can to prevent civilian deaths.

"The United States condemns any terrorist attack anywhere, period. We've always stood by that," Nikki Haley, the US ambassador to the United Nations, told CNN.

Iran summoned diplomats from three European countries late Saturday in the wake of a deadly attack on a military parade that it blamed on "a foreign regime."