Off contract Brisbane hooker James Segeyaro has been provisionally suspended by the NRL after testing positive to a banned substance.

The NRL confirmed on Thursday night that the PNG international had returned a positive A-sample for Ligandrol, a non-steroid anabolic agent popular with bodybuilders.

“Under the anti-doping policy, Mr Segeyaro now has the opportunity to have his B-sample analysed,” an NRL statement said.