Fan's vile racist taunt towards Greg Inglis has been exposed

Rabbitohs players have rallied around Inglis. Photo / Getty Images.

South Sydney say Greg Inglis remains in good spirits as the investigation into Saturday's alleged racial slur against the NRL superstar continues.

Penrith officials met with the NRL and NSW Police on Tuesday to hand over information to the game's governing body as they try to close in on the perpetrator.

According to Channel Seven rugby league reporter Josh Massoud, the Panthers claim the abuser said: "Inglis! Do you want a dollar to buy some ethanol to sniff ya Dog!"

Rabbitohs players have rallied around Inglis, who has previously been at the centre of a racial slur from an online troll in 2013 and had Andrew Johns apologise to him over another incident in the 2010 NSW State of Origin camp.

"Greg himself is fine," Souths captain Sam Burgess said. "Greg has been great. He's not kicked a fuss up, he's not said too much about it, it's not causing a distraction among the team.

"Obviously what happened out there at Penrith is not what we want in sport across schools or anywhere really, across the country or world.

"We're disappointed but Penrith are doing everything they can to find a result. We trust they'll do the right thing but Greg is okay."

NRL chief executive Todd Greenberg threatened to "throw the book" at the culprit on Monday, saying they'd "no longer be welcome back in the game".

Inglis was jeered by members of the Panthers Stadium crowd when he left the field for a concussion check early in the second half, but it's understood the alleged slur occurred at full-time.

Meanwhile, Inglis is recovering well from the concussion and is expected to be fit to take on Manly on Saturday night as part of the ANZ Stadium double-header. He's also expected to remain at centre as Souths try to turn their 0-2 start around.

Inglis spoke last week about wanting to return to fullback as part of a reshuffle in place of Alex Johnston once he returns to full fitness, but the Rabbitohs don't want to rush the Kangaroos superstar.

"He had a big year off with the knee injury, and it's a big injury," hooker Damien Cook said.

"We've got to let Greg get back into the game and get his confidence up. He's very good in the centres. That's why he gets picked there for State of Origin.

"Alex is doing a good job back there. The team is going to get better as well, and once Greg gets confidence and starts playing his best footy we all know what he can do."