Last year, a similar incident took place during Erdogan's visit to Washington when Erdogan guards beat Turkish journalists who were protesting for their free speech rights.
"This kind of thing can not go unresponded to diplomatically", he said.
The militia associated with the PYD, the People's Protection Units (YPG), are allies of the United States, while the Turkish government considers them a terrorist organization. "There is no excuse for this kind of thuggish behavior", he tweeted.
Police intervened into the fighting between the two groups while a video recording posted on social media the same day revealed that Erdoğan's guards in suits were also involved, physically attacking the protesting group.
The VOA shows that the member of Erdogan's team who went off to where the violence erupted came back (at around 1:14 in the clip) as the longtime leader in Ankara left his auto and looked at the scene before heading inside. In all, 12 people were injured.
Turkish President Recep Tayyip Erdogan watched Tuesday as men believed to be members of his security detail attacked protesters in the nation's capital, US News reports.
The incident poses a series of uncomfortable global relations issues for the current administration, who seem to be increasingly cozying up to Erdoğan despite (or because of) his authoritarian policies. They have raised concerns with the Turkish government "at the highest levels".
Speaking too freely might be grounds for a beating in Turkey. When the agents verified that the men who attacked the protesters had diplomatic status, they were released to the State Department.
The Turkish Embassy maintains the bodyguards were acting in self defense and that the protesters were "aggressively provoking Turkish-American citizens who had peacefully assembled to greet the president".
At least two people were arrested and nine people were injured.
A senior Republican senator is calling for Turkey's ambassador to be thrown out of the country in response to violence involving members of President Recep Tayyip Erdogan's (REH'-jehp TY'-ihp UR'-doh-wahns) security detail.
Although the PKK is recognised as a terrorist organisation by Turkey, the United States and the European Union, their supporters are usually not arrested in western countries in the same manner that sympathisers of Daesh, another terrorist organisation, routinely are.
Turkey views the separatist Kurdistan People's Party (PKK) and its affiliates in Syria, the PYD, as terrorist organisations - but the U.S. sees Kurdish militias as the most effective ground forces against the extremist organisation.