On a day when Australian sport was smeared with claims of drug cheating, police confirmed they have uncovered vials of urine hidden in dressing room plumbing at the Gold Coast Titans home ground during a bomb-sweep exercise.
The suspicious discovery was revealed on Thursday as Australia's biggest drugs-in-sport scandal erupted.
Police sources told The Courier-Mail the containers were found stashed in the Titans home dressing rooms at Skilled Park stadium, Robina, by officers undertaking bomb detection training ahead of next year's G20 summit in Brisbane.
The discovery is believed had been referred to the Australian Sports Anti Doping Authority (ASADA).
Titans management was immediately informed but said they have not been contacted by ASADA.
The NRL club's operations boss, Ian Buchanan, said the discovery was a mystery and the vials could have been put there by any sporting team that used the ground.
"The Rugby Sevens were played there in October and there was a rugby Test between Australia and Argentina in September," he said.
"There is more than one tenant at Skilled Park and I certainly don't think it's fair to point the finger at us.
"It (the urine) could even have been left there from the soccer days (when the now-defunct Gold Coast United played at Skilled Park)."
Mr Buchanan said police had advised Titans CEO David May about the discovery as a "heads-up".
"They said it was found during a bomb sweep," he said.
"There was nothing formal about it. They didn't ask for a 'please explain'. How could they when there are so many teams that use the venue?"
Mr Buchanan said strict ASADA protocols surrounding drug testing made it virtually impossible to switch samples.
Players were followed into the dressing room by drug testers and monitored before being taken to a separate room to provide a sample.
"Every move they make is watched, to the extent of them actually urinating into the bottle," Mr Buchanan said.
The Titans played their last 2012 home game at Skilled Park in early September and resumed training in November.
Players are drug-tested in the off-season but Mr Buchanan said they did not normally train at Skilled Park.
A spokesman for Skilled Park operator Stadiums Queensland said the Queensland Police Service had not advised of the urine vial find.
The Courier-Mail sought comment from ASADA but it was not forthcoming last night.
The Titans earlier released a statement pledging the club's full support into the NRL's investigation into doping and integrity in the wake of the damning Australian Crime Commission investigation.