Visitors walk through the entrance gate of the Auschwitz concentration camp in Oswiecim, southern Poland, in 2005. The sign over the gate was stolen in December and recovered two days later.  Visitors walk through the entrance gate of the Auschwitz concentration camp in Oswiecim, southern Poland, in 2005. The sign over the gate was stolen in December and recovered two days later. (Herbert Knosowski/Associated Press)A court in Poland found three men guilty in the December theft of a notorious sign from the former Auschwitz concentration camp.

The three Polish men received prison sentences Thursday ranging from 18 months to 2½ years, after they confessed in a Krakow court. In accordance with Polish privacy laws, the men were identified as brothers Radoslaw M. and Lukasz M., as well as Pawel S.

In German, the sign reads "Arbeit Macht Frei," which means "Work Sets You Free." It was recovered two days after the theft, found cut into three pieces.

Authorities said the three men convicted Thursday were working for someone else.

On March 11, Sweden agreed to extradite former neo-Nazi leader Anders Hogstrom, 34, who was arrested as a suspect in the theft of the sign.

Polish officials have not revealed what role the Swede may have played in the theft or if he was the buyer of the sign.

Sweden agreed to hand over Hogstrom to Poland on the condition that if he is convicted in that country, he would serve his sentence in Sweden. Poland has agreed to the deal.

Hogstrom was given three weeks to appeal the extradition.