The Turkish army blamed the Syrian regime for an air strike on Thursday in northern Syria that killed three soldiers and wounded 10, it said in a statement.
“In the air strike assessed to have been by Syrian regime forces, three of our heroic soldiers were killed and 10 soldiers wounded, one seriously,” it said in a statement on its website.
The army said in the strike took place at 3.30am (0030 GMT) in the Al Bab region. It said the wounded soldiers were evacuated rapidly from the area.
It would be the first time Turkish soldiers are known to have been killed by Syrian government forces in the offensive, dubbed Euphrates Shield, which was launched on Aug 24.
The operation aims to push IS militants, as well as the Kurdish YPG militia, away from the Syrian side of Turkey’s border and has advanced to near the city of al-Bab, which is controlled by militants.
Earlier, security and hospital sources in Turkey said IS fighters had carried out an attack which killed three Turkish soldiers in the al-Bab region. They said the wounded soldiers were transferred to hospitals in the Turkish border provinces of Kilis and Gaziantep.