Ricky Hatton Promotions, the company that handles heavyweight Lucas Browne, called the recent reports that Browne flunked another drug test “disappointing” while also defending Browne as someone who wouldn’t “intentionally” take a banned substance.

The company also suggested the positive drug test may have been the result of prescribed medication Browne was taking. WBC president Mauricio Sulaiman told RingTV.com on Monday that Browne tested positive for the banned substance ostarine while enrolled in the WBC’s Clean Boxing Program with VADA.

“Clearly the test results are hugely disappointing for the company and for Lucas himself,” the company said in a prepared statement on Tuesday. “With a man’s livelihood and reputation at stake, we feel it is only right and proper to make thorough investigations before commenting on the circumstances of this latest test result. Even though he has no WBC ranking to protect and is in a position for a mandatory WBA world title fight, Lucas entered the WBC Clean Boxing program voluntarily. We do not feel that is the action of a man who wishes to intentionally take performance enhancing drugs.”

Browne signed up for the Clean Boxing Program in July after he was stripped of a WBA title he won against Ruslan Chagaev in March for testing positive for clebuterol. Claiming he didn’t knowingly take a banned substance, Browne sued the WBA over losing his title. As a concession to resolve the lawsuit, the WBA agreed to let Browne face Shannon Briggs for a vacant WBA ‘regular’ title. The bout with Briggs now appears in doubt, though the WBA hasn’t commented yet on the positive drug test.

“We will be working closely with Lucas’s team and his lawyer, Leon Margules, to conduct a thorough investigation into the supplements Lucas has been advised to take on a day to day basis,” the statement went on. “We will also look into any prescribed medication he has been given in order to seek out the source of the alleged banned substance. Once that investigation has taken place and the circumstances of the test results have been understood, will we comment further.”