The United Nations said this week that it was concerned at Kurdish forces using civilians in North-West Syria as 'human shields'.
The UN spoksperson, Ravina Shamdasani described reports of civilian deaths from air strikes and ground strikes as "deeply alarming".
In a statement on Friday, she said the UN had received reports that civilians are being prevented from leaving the area by Kurdish fighters.
There are "reports that civilians are being prevented from leaving Afrin city by Kurdish forces [and] are being held to be used as human shields," Ms Shamdasani added.