KUALA LUMPUR, Oct 7 — The prospects of Jack Walker in the Australian administration is now uncertain after his country’s prime minister, Malcolm Turnbull, said this will be reviewed after the former pled guilty here to stripping down to briefs emblazoned with the Malaysian flag.

Australian news outlet The Daily Telegraph quoted Turnbull as saying that he will speak to Walker after the latter returns to Australia.

Turnbull reportedly said that Walker, an aide to Australia’s Defence Industry Minister Christopher Pyne, "needs to have a very hard look at himself”.

"I’m sure we will be considering his future carefully,” Turnbull was quoted as saying.

Turnbull also categorised Malaysian authorities as "very lenient” after Walker and eight others were released with a warning despite pleading guilty in court yesterday.

Sepang Sessions Court judge Harith Sham Mohamed Yasin yesterday dismissed public nuisance charges against the nine Australians by invoking Section 173A of the Criminal Procedure Code to not impose any punishment and instead released all nine with a caution.

A spokesman for the nine earlier read out an apology in an open court, after they had pleaded guilty and admitted to an "error in judgement” over their actions during the weekend’s Malaysian Formula One Grand Prix in Sepang.