Still and video cameras were trained on Russian ambassador Andrey Karlov, who was giving a speech when a man in short hair and a dark suit suddenly shot Karlov in the back. Video captured of the incident shows Karlov grimacing and falling to the ground as the gunman moving toward his body. (See below)

Turkish media reported the gunman had been killed. Foreign Ministry spokeswoman Maria Zakharova made the announcement that Karlov had been killed in a live televised statement.

The 62-year-old ambassador had been attending an art exhibition at the Contemporary Arts Centre in the Cankaya area of Ankara, along with other dignitaries and media, Sky News reports.

Turkish security sources and Ankara’s mayor said the gunman was an off-duty police officer who worked in Ankara.

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It is understood he entered the building using his police ID and opened fire on the ambassador as he made a speech.

A video showed him shouting: “Don’t forget Aleppo, don’t forget Syria! ALLAHU AKBAR!!!”

“So long as our brothers are not in safety, you will not taste safety either.”

“Only my dead body will leave here.”

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“Whoever is involved in this cruelty, one by one, you will pay for it.”

WARNING: This video includes graphic images

“While [Karlov] was doing his tour of the exhibition, people that came in, they were really well dressed and, according to witnesses, they took out their guns and started shooting everyone,” said Sky News producer Guldenay Sonumut, who is based in Istanbul.

The gunman also shot three others, according to reports.

Private NTV news channel said Turkish police have shot dead the gunman.

More follows…