Roberts was accused of pulling a woman’s hair and yanking her head back after the Broncos star enjoyed a day at the Gold Coast races.

The woman met with the NRL Integrity Unit who proceeded to grill Roberts and seek answers from the establishment for which the centre was evicted.

That’s where the investigation ends. For now.

The integrity unit requested video surveillance which would have verified what actually happened but the owners refused to do so.

“The NRL Integrity Unit has determined that no action will be taken against Brisbane Broncos player James Roberts, but the matter will remain open in case any further evidence becomes available,” the NRL said in a statement.

NRL Head of Integrity Nick Weeks said on the evidence currently available, it was not reasonable to take disciplinary action against Roberts.

Mr Weeks said it was disappointing that the nightclub operators had refused to allow the NRL to view footage from the evening in question.

"We need to judge the case on the facts available to us and, at this time, there is insufficient evidence to take disciplinary action against James," he said.

Mr Weeks said the Broncos and Roberts had co-operated with the Integrity Unit throughout the investigation.

Roberts has been sacked by Penrith and South Sydney due to off-field issues.

He was fined $20,000 last year for allegedly verbally abusing a female worker at a Brisbane watering hole.