German police have arrested another man suspected of supporting the neo-Nazi group National Social Underground , which is believed to have killed 10 people since 2000.

The 32-year-old man, identified only as Andre E., was arrested Thursday near the eastern city of Potsdam. He is believed to have been involved in the production of a 2007 video that took responsibility for the killings. Nine immigrant shopkeepers — eight of them of Turkish and one of Greek origin, as well as a German policewoman were killed during the alleged NSU spree.

Also in custody is one of the group's founders, Beate Zschaepe, and a 37-year-old man known only as Holger G.

The neo-Nazi organization was not discovered until two of the group's founders died earlier this month in a suspected murder-suicide.

The German parliament has condemned a wave of neo-Nazi killings and the failure of police to stop a years-long murder spree.

German Chancellor Angela Merkel last week called the killings right-wing terror and a “disgrace” for Germany, whose Nazi past makes right-wing militancy a particularly sensitive subject. She urged a concerted effort be made to track down those responsible, along with a fresh drive to ban the radical neo-Nazi National Democratic Party . Earlier efforts failed on legal grounds.