A decision to investigate 30 alleged former guards at Auschwitz was prompted by the case of Ukraine-born John Demjanjuk.
Demjanjuk was the first Nazi war criminal to be convicted in Germany without evidence of a specific crime or victim but purely on the grounds he had served as death camp guard.
He died last year, aged 91, while appealing against a five-year jail sentence for complicity in the murder of more than 28,000 Jews at the Sobibor camp in Poland.
More top news
At least one person has died in the crash after the plane came down in the city of Riverside shortly after take off.
The animal is believed to have been attacked with metal bars, knives and rocks and later died of his injuries.
More than 20,000 allegations of abuse by care home workers have been made in the last three years, figures show.