Malta’s online gambling regulator is pushing back against ‘whistleblower’ claims made by a former employee.

On Wednesday, the Washington-based National Whistleblower Center (NWC) made public a letter it sent to Malta’s Prime Minister Joseph Muscat and to Gianluca Esposito, exec secretary of the Group of States Against Corruption (GRECO), seeking protection for former Malta Gaming Authority (MGA) staffer Valery Atanasov.

The NWC’s letter claims Atanasov observed “IT irregularities and lack of enforcement” of gambling regulations, which he claimed “could allow for money laundering and other crimes.” The letter claimed Atanasov was disciplined and eventually fired after approaching MGA execs with his concerns, and the NWC requested that GRECO “officially monitor this case.”

On Thursday, the MGA published its response to the NWC’s letter, claiming Atanasov was terminated from his job as an IT Administrator in February 2015 due to “charges of incompetence, poor performance and abuse” dating back to 2011.