In a statement Sunday, the Turkish General Staff said Syrian opposition fighters had been exposed to chemical gas during a Daesh missile attack.
The General Staff said 22 fighters -- who combat Daesh in alliance with Turkish forces within the scope of Operation Euphrates Shield -- were observed showing symptoms of chemical gas exposure in northern Syria's Khalidiyah region.
The Turkish military also said a clash with Daesh militants had left one opposition fighter dead and 14 others injured.
Meanwhile, Turkish warplanes destroyed four Daesh targets in the Anifah neighborhood near al-Bab, also in Syria's north.
Operation Euphrates Shield was launched by Turkey in late August to rid the northern Syrian border area of militants.
