Broncos boss Bruno Cullen says the NRL club has "taken further steps" to co-operate with police after meeting with officers in charge of the investigation of three players over an alleged sexual assault in a Brisbane nightclub toilet.

Broncos' Queensland Origin stars Karmichael Hunt, Darius Boyd and Sam Thaiday were named in media reports as the players questioned by police.

A 24-year-old woman alleged she was sexually assaulted in the male toilets of the Alhambra Lounge in inner-city Fortitude Valley on Saturday night.

The Broncos have also launched their own internal investigation of the alleged incident.

After a behavioural expert called for the Broncos to "take a stand" and stand down the players for the NRL finals, Brisbane named an unchanged line-up for their must win Saturday night clash with Melbourne at Suncorp Stadium.

"This morning I met with two senior police officers in charge of the police investigation and we covered the process followed to date by both parties," Cullen said in a statement.

"We also confirmed our resolve to work together to ensure all the facts are presented by all witnesses.

"The Broncos have taken further steps this afternoon to make sure this happens in an orderly and practical manner and as soon as possible."

But Cullen said he had kept NRL boss David Gallop up to date with developments but would not comment further on the police investigation that Police Minister Judy Spence claimed could take weeks to conclude.

"In my discussions with the police it was agreed by both parties that we should not discuss any aspect of the investigation until it is complete," Cullen said.

"It was agreed that could lead to speculation and that would not be helpful to the investigation or those involved.

"I have continued to keep NRL CEO David Gallop informed on the process we are following.

"As advised yesterday I will be available for comment as soon as the investigation is finalised."

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