Story highlights US official: "The conduct of Turkish security personnel earlier this week is deeply disturbing"

Official also confirmed two members of Erdogan's security detail were briefly detained

(CNN) New video footage has emerged that shows Turkish President Recep Tayyip Erdogan looking on as Turkish security officials beat up protesters outside the country's embassy in Washington earlier this week.

Erdogan, who met with US President Donald Trump at the White House just hours before the fighting broke out on Tuesday, briefly witnessed the brawl in which nine people were left requiring hospital treatment.

A video shows the Turkish President standing near his car as the fighting ensued, before turning his back and walking into the embassy.

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On Wednesday the Turkish Ambassador to the US Serdar Kılıç was summoned to the State Department , a senior State Department official told CNN.

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