(CNN) -- Turkey launched a ground operation across the border into northern Syria on Sunday, in a move likely to raise tensions with the United States.
Turkish officials said the troops entered the Afrin area a day after Turkish jets pounded targets there in an attempt to drive US-allied Kurdish militia from the area. "Operation Olive Branch is ongoing as planned and the ground operation has started," the Turkish armed forces said in a statement.
The land operation comes hours after Turkish jets targeted US-backed, Syrian-Kurdish YPG militia in the area, killing at least eight people and injuring 13, according to the Syrian Democratic Forces General Command.
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