A teenager has been arrested over the hijacking of high-profile Twitter accounts in the US.
It follows the failure of an NHS-branded app in England, which was trialled on the Isle of Wight.
Twitter says employees were tricked into handing over credentials to the cyber-attackers.
He was permanently suspended for repeatedly violating Twitter’s “hateful conduct” rules.
BBC Click’s Jen Copestake looks at the best of the week’s technology stories.