The US Marshals Service has deputized members of Elon Musk’s private security detail, giving them certain rights and protections of federal law enforcement agents, three law enforcement officials familiar with the matter told CNN.

Elon Musk is reportedly growing more concerned about his safety as the US Marshals Service deputizes members of his security team amid a swathe of death threats that have led to an arrest

Musk said in a Thursday public appearance his security detail should potentially be bigger and that he was “open to ideas” on improving his security.