Mogherini said that “only a few days ago, all of us including Turkey, sitting around the table decided steps to de-escalate and have a cessation of hostilities.”
She said more fighting “is obviously not what we expect.”
Syria’s main Kurdish faction, the People’s Protection Units, has been most effective in combating the Daesh group, but Turkey appears uneasy over the group’s recent gains, the New Europe group reported.
Turkey shelled positions held by a US-backed Kurdish militia in northern Syria for a third day on Monday, drawing condemnation from the Syrian government, whose forces are advancing against militants in the same area under the cover of Russian airstrikes.
Turkish troops have shelled areas under the control of Syria’s main Kurdish faction, the People’s Protection Units, known as YPG, in the past.