Extradited US man to face Sydney court over Thai national’s alleged murder

An American man has been extradited and is expected to face a Sydney court over the alleged murder of Wachira "Mario" Phetmang whose body was found by a road.

American man Alex Dion has been extradited over the murder of Wachria "Mario" Phetmang. Source: AAP

A man is expected to face a Sydney court after he was extradited from the United States and charged with murdering Thai national Wachira "Mario" Phetmang.

Alex Dion was charged on Sunday after he arrived in Sydney from California under police guard.

Alex Dion arrives at Sydney International Airport in Sydney. He will face a Sydney court today. Source: AAP

The 38-year-old was refused bail and is expected to face Central Local Court on Monday.

Police say Mr Phetmang's body was discovered by a truck driver in June 2018, wrapped in a plastic material and covered with a mattress protector.

CCTV shows Wachira "Mario" Phetmang before his death. Mr Phetmang's body was found wrapped in a mattress protector at Olympic Park in June last year. Source: Supplied

Mr Phetmang, 33, had been living in Australia for the last 10 years.

Australian authorities issued a warrant for the arrest of Dion, a US national, in September 2018.

Detectives travelled to the US last week to extradite him after he was arrested by local authorities there last year for an unrelated matter, according to NSW Police.