Watch live coverage of commemoration to mark 70 years since the liberation of Auschwitz

Live video stream of the commemoration

Auschwitz survivor Miroslaw Celka walks out the gate on Holocaust Memorial Day 2015 (AFP/Getty Images)

Several hundred Holocaust survivors have returned to Auschwitz in southern Poland to mark 70 years since the liberation of the notorious Nazi concentration camp.

On Holocaust Memorial Day, world leaders joined survivors to remember the systematic murder of millions of Jews, homosexuals, gypsies, disabled people and political prisoners.

Auschwitz survivors made an emotional visit to the “death wall”, which was the site of thousands of executions before the construction of gas chambers.

Survivors left wreaths at the wall and paused to reflect the millions murdered, among them family and friends.

Some wore sashes displaying the numbers assigned to them at death camps and symbols telling why they were taken by the Nazis – an inverted red triangle for a political prisoner on striped blue and white fabric evoking the striped uniforms they were made to wear.