A gunman killed the Russian ambassador to Turkey at an art exhibit in Ankara. The lone shooter was shouting "God is great" and "don't forget Aleppo, don't forget Syria," reports say.

A graphic video of the assassination shows the ambassador Andrey G. Karlov speaking at Ankara's Contemporary Art Center, as the suspect, described by Ankara's mayor as a police officer, fires several shots at him. Karlov later died of his wounds.

Turkish officials said the gunman was later killed in a shootout with Turkish Special Forces.

Russian president Vladimir Putin condemned the assassination, calling it a terrorist attack, according to reports.

The attack comes days after Russian involvement in the assault on Aleppo where killings and mass destruction occurred according to several sources. 

View graphic images from the art exhibit in the gallery above.

[via New York Times]