The toll in Turkish air strikes on Kurdish forces in northeast Syria early Tuesday rose to 18 people dead, according to the Syrian Observatory for Human Rights.
"The dead are fighters and media officials from the People's Protection Units (YPG)," said Observatory head Rami Abdel Rahman, who had earlier reported a toll of three people in the dawn raids. 
In a statement distributed to journalists, the YPG confirmed that there were casualties from the Turkish bombardment but did not give a toll.