Coalition warplanes, led by the United States, hit a settlement unit in Tal Abyad city of northern Raqqa province and killed 20 civilians, said Syrian Revolution General Comission (SRGC) in a statement on Saturday.
Tal Abyad, held by ISIS, is an oil-rich city located 65 kilometers east of Kobane and also a key city between Turkey and northern Syrian province of Raqqa, the defacto capital of ISIS.
SRGC also reported many others were wounded and severe damage occured in the hard-hit Arab-Kurdish city after the attack.
Over last ten days, some 13,000 civilians entered in Turkey, escaping from violence of heavily armed ISIS in the city of Tal Abyad, according to the Turkish Foreign Ministry.
The main Kurdish armed group ‘’People's Protection Units’’ (YPG), that fights against ISIS for the Syrian city since the Kurds launched an offensive earlier this months, advancing closer to Tal Abyad on Saturday.
Rami Abdel Rahman, Observatory head from the Syrian Observatory for Human Rights, said ‘’Kurdish forces are on the eastern outskirts of Tal Abyad, only five kilometres (three miles) from the town.’’
According to UN estimates more than 220,000 people have been killed in Syria since the start of the war that started as an uprise and descended later into a complex civil war. More than 6.7 million people have fled the country while millions of others are displaced internally.