The move is similar to a police raid on the alternative media outlet last October, when Indymedia servers in London were confiscated just prior to the European Social Forum.

Before police confiscated its servers, Indymedia Bristol stated: "We do not intend to voluntarily hand over information to the police as they have requested."

One person was reported to have been arrested during the raid. The independent news group said that it is receiving advice from civil liberties organisations and the National Union of Journalists.