RUGBY league has suffered another black eye amid allegations of a wild brawl involving a large group of spectators that erupted at Penrith following a junior representative match on ­Saturday.

The incident occurred inside Penrith Stadium at the back of the grandstand following an under-17s Harold Matthews Cup match ­between the Panthers and Central Coast. It was the first official weekend of the NSW junior representative competition.

Several witnesses have ­described it as the most violent fight they have seen, with women and “even little kids” caught up in the thick of it.

It is alleged it started with a verbal argument between two women but quickly escalated to an ugly all-in, with one witness estimating as many as 40 people were involved.

The witnesses all claim to have seen a woman pull out a baseball bat although they did not see her attack anyone with it.

One explained: “It was a silver baseball bat. She came running around the back. We didn’t see her hit anyone.”

It is understood no Central Coast players or spectators were involved, however it’s claimed teenagers wearing Penrith’s club colours had to be pulled back by what looked to be club officials.

“There was a lot of people there,” a man said. “They weren’t all throwing punches but they were all in and around it. It was just huge.”

Asked to estimate how many people were throwing punches or actually involved in the fight, he said: “There would be at least a dozen.”

One mother called the scene “crazy”. “Even little kids were amongst it,” she said.

“It was definitely a shock to us, we don’t usually see stuff like that.”

The NSWRL chief executive Dave Trodden said the ­allegations would be fully investigated.

Penrith are preparing a report for us at the moment and we will receive those details (on details (on Monday),” Mr Trodden said.