Blonde bloody to South Sydney! Frustrated Rabbitohs fan left bloodied after brawl at Allianz Stadium as Roosters hand out record whipping

The NRL is expected to launch an investigation following a nasty brawl between Roosters and Rabbitohs supporters at Allianz Stadium on Friday night.

Trent Robinson’s men routed their fierce rivals 48-6 – and tensions then reached boiling point with rival supporters at Moore Park in Sydney.

With the Roosters comfortably ahead at the end of the second half, a fight began in the members’ section of the revamped sports facility moments after South Sydney fullback Latrell Mitchell had been sin-binned.

Footage of the incident shows several people involved in the brawl exchanging a flurry of blows – with many terrified children in view.

Security initially struggled to intervene before many involved eventually walked away.

A man wearing one The Rabbitohs jersey was spotted with a bloody mouth.

CCTV is expected to be used in a bid to identify those involved, with bans from NRL games and potentially court dates set to follow.

On the field, the Rabbitohs fell to their third successive defeat, with under-pressure coach Jason Demetriou now facing an uncertain future.

– It’s disappointing, it hurts, it’s probably the lowest point in my career right now, but I know how we’ll get out of it. We will fight and fight together, he said at the press conference after the match.

‘I have a lot of confidence in this group and I know they will pull it off.

‘The only way to quiet (the noise) is to get laser focus and get our season going again.

‘It’s a matter of just getting the first win. We have to be more robust.’

Demetrious’ decision to drop half-back Lachlan Ilias earlier this week raised many eyebrows – as did benching hooker Damien Cook.

Star recruit Jack Wighton was also seen clutching a knee late in the contest in what was a night to forget for the Bunnies.