A Turkish air raid struck the main hospital in the Kurdish-controlled Syrian town of Afrin on Friday, killing 16 civilians, the Syrian Observatory for Human Rights said.

According to the organization, Turkish forces have renewed airstrikes against Afrin, in northwestern sector of Aleppo Province. 

Friday’s airstrike on the hospital resulted in the death of 16 people, including two pregnant women, the organization said in a statement. 

According to reports, this was the only functioning hospital in the area. 

Turkey and allied rebels have waged a nearly two-month offensive on the Afrin region, which is held by the Kurdish People's Protection Units (YPG).

AFP reports that pro-Ankara forces are on the verge of besieging Afrin, and terrified civilians have poured out of the city. 

At least 15,000 people left Afrin on Friday, according to the Observatory.