Rockets fired from Syria hit Turkey border

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 region 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.

The military incursion is likely to raise tensions between Turkey and the United States, which supports and openly arms Kurdish militias fighting ISIS.

Turkish President Recep Tayyip Erdogan said the operation would be completed "in a very short time," during a public address Sunday in the city of Bursa, according to the Turkish state-run news agency Anadolu.

Rockets from Syria hit Turkish city

The land operation comes as YPG missiles fired from Syria hit the Turkish border town of Reyhanli Sunday, according to Turkey's Deputy Prime Minister Bekir Bozdag.

One Syrian national was killed and 32 wounded in the attack, the town's mayor said on Turkish broadcaster NTV.

Syrian President Bashar al-Assad denounced what he called "Turkish brutal aggression on the Syrian city of Afrin," according to the state-run Syrian Arab News Agency (SANA).

Earlier in the day rockets fired from Syria also hit the Turkish border city of Kilis, according to Anadolu.

One person was injured and buildings damaged in the attack, said local governor, Mehmet Tekinarslan.

It was not immediately clear who fired the rockets, though they followed Turkish airstrikes on areas under the control of the People's Protection Units, also known as the YPG.