The United States Anti-Doping Agency revealed on Friday afternoon that lightweight competitor Felipe Olivieri is the latest UFC fighter to be flagged for a potential anti-doping violation.

According to the statement, Olivieri tested negative for banned substances during the in-competition fight night testing but later failed an out-of-competition test that led to the violation.

The entire statement is available below:

The UFC organization was notified today that the U.S. Anti-Doping Agency (USADA) has informed Felipe Olivieri of a potential Anti-Doping Policy violation stemming from an out-of-competition sample collection. Although the sample collected from Olivieri following his bout at UFC Fight Night: Johnson vs. Bader on January 30, 2016, was reported as negative for prohibited substances, a sample collected from him in Brazil earlier that month, and analyzed at the WADA accredited laboratory in Rio de Janeiro, was recently reported to USADA as containing a prohibited substance. USADA, the independent administrator of the UFC Anti-Doping Policy, will handle the results management and appropriate adjudication of this case involving Olivieri, as it relates to the UFC Anti-Doping Policy and future UFC participation. Because Olivieri participated in a bout sanctioned by the New Jersey State Athletic Control Board after the sample in question was collected, USADA will work to ensure that the Board has the necessary information to determine the appropriate course of action under the Board's rules.

According to MMAFighting, who spoke to Oliveiri and Nova Uniao head coach Andre Pederneiras, the substance he tested positive for was methyltestosterone. He maintains that he has never ingested banned substances.