This photographer carried on working in the face of a Turkish assassin

Associated Press photographer Burhan Ozbilici was attending a routine job at the opening of a photography exhibition in Ankara, Turkey.

But the event descended into horror when the Russian ambassador to Turkey, Andrei Karlov, was assassinated by a local police officer later identified as Mevlut Mert Altıntas.

Ozbilici captured the murder in astonishing detail and reflected on the incident in a piece for Associated Press.

"It was a coolly calculated assassination, unfolding in front of me and others who scrambled, terrified, for cover as the trim man with short hair gunned down the Russian ambassador," he said. "I was afraid and confused, but found partial cover behind a wall and did my job: Taking photographs."

This is the story of how Karlov's death unfolded, through the eyes of Ozbilici.