The international community condemned the assassination of Russia's Ambassador to Turkey, Andrey Karlov, at an art gallery in Ankara on Monday evening.
An off-duty policeman shot Karlov multiple times as the ambassador spoke at the opening of a photo exhibition.
Karlov was rushed to hospital but died of his injuries.
Turkish special forces shot the assailant dead at the scene.
The exhibition, titled "From Kaliningrad to Kamchatka, from the eyes of travellers," featured photos from Russia's westernmost Baltic region to the Kamchatka Peninsula, in the east.
Political leaders from around the world have condemned the attack.
US Secretary of State John Kerry called it an "act of violence."
US President-elect Donald Trump also condemned the attack.
Today there were terror attacks in Turkey, Switzerland and Germany - and it is only getting worse. The civilized world must change thinking!— Donald J. Trump (@realDonaldTrump) December 19, 2016
NATO Secretary General Jens Stoltenberg expressed his condolences.
I condemn the killing of Russias amb to Turkey. My condolences to his family & Russian people. No justification for such a heinous act.— Jens Stoltenberg (@jensstoltenberg) December 19, 2016
British Foreign Secretary Boris Johnson called it "a cowardly attack."
French President Francois Hollande condemned the attack "with force."
Je condamne avec force lassassinat de lAmbassadeur de Russie Ankara.— Franois Hollande (@fhollande) December 19, 2016
Social media was abuzz after the assassination.
Here are some other reactions from Twitter:
Israel condemns the brutal assassination of Ambassador Karlov in Ankara— PM of Israel (@IsraeliPM) December 19, 2016
We send our deepest condolences to his family and the Russian people
Deeply shocked by assassination of Russian Ambassador to Turkey, Andrei Karlov. I extend my condolences to his family and Russia.— Margot Wallstrm (@margotwallstrom) December 19, 2016