BERLIN - Three elderly men alleged to have served as SS guards at the Auschwitz death camp have been released from custody, but prosecutors say the investigation against them continues.

Stuttgart prosecutors' spokeswoman Claudia Krauth said a 92-year-old suspect was released Thursday but had to pay a bond and give up his

passport. A 94-year-old and an 88-year-old were released over the past week.

Krauth said her office didn't object because it was not necessary for the investigation to have the three in custody. They were all incarcerated in February after prosecutors said there was significance evidence that they could be charged as accessories to murder for serving as Auschwitz guards.light on some 30,000 accounts holding almost $120bn (£78bn) of assets.

The revelations will amplify calls for crackdowns on offshore tax havens and stoke political arguments in the US, Britain and elsewhere in Europe where exchequers are seen to be fighting a losing battle against fleet-footed and wealthy individuals in the globalised world.

The files themselves were first obtained by a former IT expert turned whistleblower, named Hervé Falciani, who worked for HSBC. Falciani fled from the U.K. to France where he gave over the files to French regulators who then shared them with authorities in other countries for the purpose of investigations into the bank's activities. Only recently, however, were the files made available to an international collaboration of news outlets, including the Guardian, the French daily Le Monde,