The attacks killed at least twenty civilians, including children.

“The United States is deeply alarmed by the frequency of such attacks in recent months, including the repeated use of vehicle-borne improvised explosive devices,” US State Department Spokesperson Ned Price said in a statement.

“Those responsible for perpetrating the violence should be brought to justice. Their actions endanger the Syrian people and threaten to destabilize the region further,” he added.

On Saturday, a car bomb exploded in Turkish-held Afrin city, which had been a majority Kurdistan area controlled by the People's Protection Units (YPG) until 2018. Eight people were killed, including four children.

The following day, two separate explosions rocked Azaz and al-Bab, with the latter targeting fighters belonging to Turkey’s Syrian rebel allies.

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