They say bad news comes in threes and it's proving the case for the NRL with Newcastle recruit Russell Packer the latest player to be interviewed by police over an alleged assault. On the same day Canterbury back-rower Reni Maitua was charged with assaulting a taxi driver and just 24 hours after Manly prop Richie Fa'aoso was picked up by police over alleged domestic dispute, Packer also could be in strife. The former Warriors front-rower, who has joined the Knights in the off-season, has allegedly been involved in an assault in Sydney last Friday night. While he has yet to be formally charged by police the Knights released a statement on Tuesday confirming their forward was being investigated over the incident. "The club will co-operate with the police and the NRL," the statement said. "Until all investigations are complete, the club will make no further comment." The NRL's Integrity Unit are investigating all three of the incidents, which has left a black mark on the code just days before its showpiece World Cup final between Australia and New Zealand. "We must all accept the need to establish the relevant facts and the Integrity Unit will carry out that task with the cooperation of the clubs," NRL chief operating officer Jim Doyle said. "If however breaches are established then we will act accordingly. "The Integrity Unit has provided a clear mechanism for assessing behavioural issues and we have already shown this year that we will act on the outcomes. "The overwhelming majority of our players are fantastic ambassadors both for the game and the community. "It is all the more important, therefore, that we send clear messages in relation to off-field misbehaviour."