UPDATE: Happening Now reported the latest, saying there was actually a third sailor involved.

The U.S. Navy said in a statement that the sailors were not hurt and back onboard their ship. An investigation has been launched with the Turkish police.

New video (above) coming in to Fox News out of Istanbul, Turkey, where protesters confronted two U.S. sailors, roughing them up and then putting a bag over their heads. 

The crowd chanted "Yankee, go home" and demanded the Americans leave the country.

From AP:

Anti-American protesters shouting "Yankee, go home!" roughed up two U.S. sailors in Istanbul near where a U.S. warship was docked on an inlet of the Bosphorus Strait in the Black Sea.

As many as 10 protesters shouted at them, calling them killers and said they should leave Turkey. The protesters, who carried a banner of the Youth Association of Turkey, threw red paint at them and briefly succeeded in putting white sacks over their heads.

A spokesman for the Youth Association, Melik Dibek, said the Americans confirmed they were U.S. servicemen.

A video of the incident shot by the group and posted online showed the protesters chasing after them, shouting "Yankee, go home!"