- Tag results for Syrian Democratic Forces
Kurdish fighter belonging to the Syrian Democratic Forces (SDF) also died in the attack.
The Syrian Democratic Forces founded in October 2015, has been backed by US-led coalition air strikes, artillery, and special forces advisers.
The delegation from the SDF's political wing is discussing the future of the autonomous administrations it has set up in areas of northern and northeastern Syria under its control.
The coalition said it killed the oil and gas network leader Abu Khattab al-Iraqi and three other Islamic State members on May 26 in the "Middle Euphrates River valley".
A total of 2,900 civilians have been killed since the Islamic State announced its "caliphate" in Syria, Syrian Observatory for Human Rights reported on Tuesday.
The French leader reaffirmed the priority of this battle against "the terrorist threat" and assured the SDF of France's support, in particular in stabilising the security zone in northeast Syria.
The US-backed Syrian Democratic Forces said Tuesday they had fully captured the Islamic State group's former Syrian stronghold Raqa, after more than four months of fighting.