Hillary Clinton’s campaign team released a statement late Wednesday decrying a Romanian hacker’s claims that he was able to easily infiltrate the former secretary of state’s private email server.

“There is absolutely no basis to believe the claims made by this criminal from his prison cell. In addition to the fact he offers no proof to support his claims, his descriptions of Secretary Clinton’s server are inaccurate. It is unfathomable that he would have gained access to her emails and not leaked them the way he did to his other victims,” the Democratic candidate’s team wrote in an email.