Personal details purportedly belonging to members of the English Defence League living in Essex and Suffolk have been leaked online by individuals claiming to belong to an international “hacktivist” group.

An audio statement posted on YouTube in the name of Anonymous UK said the release of the information is the first part of a campaign to destroy the far-right movement.

Accusing the EDL of using the killing of Drummer Lee Rigby to spread bigotry and misinformation, they said they aimed to begin a “systematic and comprehensive decimation [sic]” of the group.

Mobile phone numbers, apparently of senior EDL members, and names and addresses of people that have donated to the group were published online this week.

Among the addresses are people from Colchester, Clacton, Braintree and Lowestoft. Twitter accounts have also re-published leaked details of hundreds of names and addresses linked to the EDL which were circulated on the web in 2010 after hackers broke in to one of the organisation’s websites, prompting it to warn members of the potential for reprisals.

More than 1,000 members of the EDL held a rally near Downing Street on Sunday, where its leaders blamed Islam for the killing of Drummer Rigby, and the group has promised to step up its activities over the coming weeks. The statement addressed to EDL in the name of Anonymous UK said the death of drummer Rigby had “thrown the United Kingdom into mourning; every community and every congregation extending their deepest condolences.

“You, however, have used this as another excuse to further spread your bigotry, and misinformation.”

The statement went on to accuse the far-right group of attempting to “radicalise” youth and pledged to begin “the systematic and comprehensive decimation [sic] of your cult.” It added: “You will fall, we can say this with complete confidence. We are everywhere, you cannot hide, you cannot win.”

It is unclear whether the people listed are actually members of the EDL. A similar list of names of supposed British National Party members, published in 2008, included some people who turned out not to be members.