A British man has been charged in the United States in connection with a Twitter hack last summer that compromised the accounts of prominent politicians, celebrities and technology moguls, the Justice Department said.

Joseph O’Connor, 22, was arrested in the coastal resort town of Estepona, Spain, on an arrest warrant accusing him of involvement in a July 2020 hack of more than 130 accounts, and of hacks that prosecutors said took over TikTok and Snapchat accounts. Prosecutors also accuse O’Connor of cyberstalking a juvenile.

The complaint charges O’Connor — who went by the online handle PlugWalkJoe — with crimes including cyberstalking, making extortive and threatening communications and intentionally accessing a computer without authorization.

O’Connor in prior interviews has denied wrongdoing.

During the security breach a year ago, fake tweets were sent from the accounts of Barack Obama, Joe Biden, Mike Bloomberg and a number of tech billionaires including Amazon’s then-CEO Jeff Bezos, Microsoft co-founder Bill Gates and Tesla CEO Elon Musk. The bogus tweets asked followers to send Bitcoin payments. O’Connor is at least the fourth suspect charged in connection with the hack.

A Florida teenager was sentenced in March to three years in prison for his role in the hacking operation. Graham Ivan Clark pleaded guilty to multiple fraud charges as part of a deal with Hillsborough County prosecutors.

Andrew Warren, the Florida state attorney who prosecuted Clark, said in an interview Wednesday he still considers him to be the mastermind of the plot.