A policy adviser to minister Christopher Pyne is one of the men arrested in Malaysia after stripping at the F1

Christopher Pyne. Photo: Stefan Postles/ Getty Images.

Jack Walker, a policy adviser to Turnbull government minister Christopher Pyne, is one of nine Australians arrested after stripping at Sunday’s Malaysian Formula One race.

Walker and eight friends were arrested in Sepang on Sunday afternoon after stripping down to their underwear, which featured the Malaysian flag.

According to the Sydney Morning Herald, the group chanted “Aussie Aussie Aussie, oi oi oi” for several minutes, and drank beer from their shoes to celebrate a win by fellow Australian Daniel Ricciardo at the 2016 F1 Malaysian Grand Prix.

The group of men who have been arrested. Photo: STR/ AFP/ Getty Images.

Sepang district police chief Abdul Aziz Ali told local reporters that the men are being investigated for breaching the peace, public indecency and disrespecting the national flag.

They are expected to be held in custody for at least four days.

The men are currently receiving Australian consular assistance.

Pyne has told Fairfax Media: “This matter is being handled appropriately by the Australian high commissioner. Until we have a clearer picture of the process at hand it would be unwise to comment further.”

Walker has worked for Pyne for three years, and prior to that worked for NSW Liberal Party powerbroker Michael Photios’ lobbying firm PremierState.