The shooting took place in an open space. At that time, Karlov gave a speech at an art exhibition in Ankara, Turkey.
Actors, Mevlut Mert Altintas, 22, shouted, "Allahu Akbar. We were dead in Aleppo, you die here, "before Karlov bombarded with shots.
Later, he was pointing a gun to the other visitors and injuring three others. Police also moved quickly to embank Altintas.
Russian President Vladimir Putin condemned the action. Putin said that this action is a form of provocation aimed at undermining the normalization of Russian-Turkish relations.
"Action was also interfere with the peace process in Syria," he said.
Turkish President Recep Tayyip Erdogan also agrees Putin statement.
"The murder was intended to destroy the Turkish-Russian relations. However, the Russian government and the Turkish Republic will not fall into provocations, "said Erdogan.