Russia’s ambassador to Turkey was shot dead on Monday by an assassin who told him: “We die in Aleppo, you die here.”

The gunman – an off-duty policeman – opened fire at an art gallery in Ankara as Andrei Karlov was making a speech, then stood triumphantly over his body shouting “revenge for Syria and Aleppo”.

Photographs taken by an Associated Press photographer who kept his finger on the shutter while others dived for cover captured the aftermath of a murder which Russia described as a “terrorist act”.