Israeli Prime Minister Benjamin Netanyahu warned Sunday over Iran's presence in Syria after Western strikes in response to the alleged use of chemical weapons and a recent attack attributed to Israel.

Arab leaders -- minus Syrian President Bashar al-Assad -- meet in Saudi Arabia for a summit on Sunday as world powers face off over Syria and tensions rise between Riyadh and Tehran.

Inspectors from the OPCW chemical watchdog will begin their investigation Sunday at the site of an alleged chemical attack near Damascus, a senior official said.

U.S. President Donald Trump and his British and French allies have hailed their joint strikes in Syria in response to its alleged use of chemical weapons, warning Damascus that any repetition would be met with renewed firepower.

Syrian President Bashar al-Assad said Western strikes on government military installations Saturday only made him more keen to fight back against his opponents, in comments published by his office. 

Experts from the world's global chemical arms watchdog are continuing their mission to probe an alleged gas attack in Douma despite Western air strikes in Syria, the body said Saturday.

Iraq warned that Western air strikes Saturday on Syria were a "very dangerous" development that could fuel a jihadist resurgence in the region.

A prominent Syrian rebel faction said on Saturday that Western strikes against government positions were a "farce" as long as President Bashar al-Assad remained in power.

Air strikes by Britain, France and the United States in Syria sent a "clear message" against the use of chemical weapons, British Prime Minister Theresa May said on Saturday.

Egypt's President Abdel Fattah al-Sisi extended for three months from Saturday a state of emergency for the fourth time since it was first declared last year, the official gazette said.