A Shetland teenager arrested by detectives as part of the investigation into hacking groups is due to be questioned by detectives.

The alleged 18-year-old hacker has been taken to London.

In Shetland it is being reported that the teenager may have been arrested at a residential address in Scalloway six miles west of Lerwick. The Metropolitan Police's e-crime unit say the youth is believed to be the spokesman for two computer hacking groups, Anonymous and LulzSec.

His name has not yet been released - but they have revealed he operates under the online pseudonym Topiary.

Topiary's twitter account has only a single message on it dated July 22.

The two groups he is alleged to be involved with have gained international noteriety in recent months. Anonymous claims to have been behind attacks that temporarily brought down websites for among others, Mastercard and Visa.

On Wednesday they promoted a legal boycott of online money transfer service payal, which they claim stopped users making donation to Wikileaks while still allowing users to make donations to the Ku Klux Klan and the English Defence League, a far-right organisation linked to Norwegian terrorist Anders Breivik.

The Twitter-publicised boycott helped wipe more than a billion pounds from the stock value of parent company Ebay.

Last month 19-year-old Ryan Cleary, who police claim was a kingpin in the LulzSec organisation, was arrested in Essex on suspicion of violating the computer misuse act.