A rescue worker said an improvised explosive device had been placed in a vehicle near a local transport office in the city, which is located near the Turkish border.
The city has been the scene of several bombings in recent years.
Turkish-backed Arab rebels in Azaz and other parts of the enclave have blamed the previous explosions on the YPG, a Syrian Kurdish militia that controls areas in the vicinity of Tel Rifat and dominates swaths of northeastern Syria.
Rebels say explosions in markets and other public places killed dozens of civilians last year, aiming to destabilize an area populated by more than 3 million Syrians who fled government-controlled areas during decades of conflict in Syria.
The YPG has accused Turkey of killing civilians in drone strikes during a war of attrition waged by Ankara on YPG-controlled territory in northern Syria.
Turkey considers the YPG an extension of its Kurdistan Workers’ Party, PKK, which Ankara designates as a terrorist group.
Reuters / NAN
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