The wounded included four security force members, it said, describing the blasts as a “terrorist operation”.
With the Kurdish YPG militia at its forefront, the Syrian Democratic Forces defeated Islamic State across much of north and east Syria with U.S. help.
But a series of bomb attacks have struck towns and villages in northern Syria in the past year, including in the SDF region.
Kurdish leaders said Islamic State sleeper cells still pose a threat and warn that a Turkish offensive at the border would allow a jihadist resurgence.