A 41 year-old man, an alleged member of Anonymous hacktivist, arrested by Scotland Yard police for allegedly hacking the Home Secretary Theresa May's constituency website and the Home Office websites.
The unnamed man is suspected of encouraging a Distributed denial of service (DDoS) attack on those sites in June this year, as part of Anonymous operation.
The police seized computers, telephones and electronic storage devices from his house.
The man has been arrested on suspicion of assisting or encouraging crime contrary to the Serious Crime Act 2007. He was bailed until mid-December.
The Detective Inspector Jason Tunn, from the Metropolitan Police's Crime Unit (PCeU), said that the arrest demonstrates the commitment of the PCeU and our colleagues to combat cyber criminality anywhere within the UK and take action against those responsible
Jason warned that assisting and encouraging cyber crime is a serious matter in the UK. " I would advise all persons to consider their actions and any possible future consequences prior to posting any material online"