Riccardo Spagni, the former lead maintainer of the privacy coin Monero, has reported U.S. officials have released him after more than a month in custody.

In a Sept. 21 tweet, Spagni said he was working with his legal team to return to South Africa to address the allegations against him. Authorities in the U.S. arrested Spagni in August on fraud charges tied to alleged crimes which occurred in South Africa between 2009 and 2011 at a company called Cape Cookies.