The Syrian army said on Tuesday Israeli jets attacked the main T4 air base in Homs province, saying its air defences downed several missiles in strikes that caused only material damage.

Russian jets struck several rebel-held towns in northwest Syria’s Idlib province for the first time since a ceasefire agreed with Turkey formally took effect two days ago, witnesses and insurgent sources said.

ISIS has carried out two attacks on Iraqi border posts along the border with Syria following the US decision to suspend counter-ISIS missions in order to focus on protecting Iraqi bases and coalition forces amid tensions with Iran, according to a US defense official and Iraqi security officials.