Auschwitz sign theft 're-enacted' by three suspects
Police found the metal sign cut into three pieces on Sunday and arrested five men in northern Poland.
Three of the five have confessed to the theft from the site in southern Poland.
The 5m (16ft) wrought iron sign - the words on which translate as "Work sets you free" - symbolises for many the atrocities of Nazi Germany.
The suspects, aged in their 20s and 30s, were not part of a neo-Nazi group, police said earlier.
Andrzej Rokita, the local police chief in Krakow, said the theft was financially motivated, and it remains unclear whether it was carried out to order.
The 40kg (90lb) sign was half-unscrewed, half-torn off from above the death camp's gate in the early hours of Friday morning.
If charged with theft and damage, the suspects face up to 10 years in prison.
The theft caused outrage in Israel and Poland.
More than a million people - 90% of them Jews - were murdered by the Nazis at Auschwitz during World War II.
The museum which stands on the modern-day site is preparing to celebrate the 65th anniversary of Auschwitz-Birkenau's liberation by Soviet troops on 27 January.