Three civilians were killed Friday when a car bomb exploded in a crowded street in the mainly Kurdish city of Qamishli in northeastern Syria, Kurdish security forces said.
The Kurdish internal security forces (Asayish) "a car bomb targeting the restaurant Omari" while the presence of civilians and journalists, "resulting in the injury of nine people varying, and the death of three civilians."
Rescue teams are still searching for more victims.
A video released by the SDF showed firefighters extinguishing a fire, while at least five cars looked charred.
Syrian television broadcast live footage of flames and black smoke from a vehicle as it burned down the street.
A spokesman for the Asayish, Ali al-Hassan, told AFP that the Islamic State was behind the bombing.
The city witnessed bloody attacks during the years of the conflict, the largest in July 2016, killing at least 48 people and injuring dozens, according to the Observatory, as a result of an ISIS suicide truck bombing.
Two car bombs injured a number of people during the summer of 2019.
Kurds and Syrian government forces have shared control of the city of Qamishli since 2012, when regime forces gradually withdrew from Kurdish-majority areas. Damascus maintains government and administrative headquarters and some troops, especially in the cities of Hasaka and Qamishli.
Since Wednesday, Kurdish-controlled border areas with Turkey have been under attack from Ankara with pro-Syrian factions. They are engaged in fierce clashes against the SDF, which is trying to prevent its advance in the area between the towns of Ras al-Ain (Hasaka) and Tal Abyad (Raqqa).
Although the SDF, whose Kurdish fighters are the backbone of this year stripping the extremist organization of its areas of control, is still able to move through sleeper cells and through its hiding fighters in the Syrian desert.
The Turkish offensive in northeast Syria has raised fears it could help revive the organization, with Kurdish fighters turning away from attacking their border areas.