Police investigating the leaking of a BNP membership list are sifting through boxes of evidence seized from the Nottinghamshire home of a former party member.
The boxes were taken from Sadie Graham's home in Brinsley. She is understood to have been arrested on Thursday, along with another person, also in Nottinghamshire. Police packed the boxes from Graham's terraced house into unmarked cars before leaving with a woman.
The leaking of the membership list last month provoked outrage after members of the far right group were revealed to be current and former servicemen, a police officer, teachers and doctors. The list, released on an internet blog, gave details including the names, professions and addresses of thousands of BNP supporters.
A spokeswoman for Dyfed-Powys Police said: "We can confirm that Nottinghamshire Police arrested two people as part of a joint investigation with Dyfed Powys Police and the Information Commissioner's Office in conjunction with alleged criminal offences under the Data Protection Act. The arrests followed an investigation into a complaint received about the unauthorised release of the BNP party membership list."
Graham was expelled from the party late last year after falling out with its leadership.
In April, the BNP obtained an injunction at Manchester's High Court banning publication of a list of its members.