Polish authorities have reopened an investigation into crimes committed at Auschwitz and its satellite camps during World War II.

It is estimated that one million people – mostly Jews and non-Jewish Poles – were killed at the Nazi death camp.

One aim is to track down any Nazi war criminals still living.

It is being carried out by the Institute of National Remembrance, a state body that investigates Nazi and communist-era crimes.

The new investigation was opened by the institute’s branch at Krakow, which is near Auschwitz.

It was not immediately clear if investigations into other death camps operated across German-occupied Poland – such as Treblinka, Sobibor, Chelmno and Belzec – were also planned.

Poland originally launched investigations in the 1960s and 1970s into crimes at Auschwitz, but closed them in the 1980s without any indictments being made.

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