Interpol has arrested 25 suspected members of the 'Anonymous' hackers group in a swoop covering more than a dozen cities in Europe and South America.

Operation Unmask was launched in mid-February following a series of coordinated cyber-attacks originating from Argentina, Chile, Colombia and Spain. The arrests were over attacks on the websites of the Colombian Ministry of Defence and the presidency, as well as on Chile's Endesa electricity company and its National Library, among others.

Coppers from Argentina, Chile, Colombia and Spain were involved.  More than 250 items of computer equipment and mobile phones seized in raids on 40 premises in 15 cities. Police also seised credit cards and cash from the suspects, aged 17 to 40.