Man accused of HungryPanda delivery rider’s stabbing murder yells and exposes himself in Melbourne court

A food delivery rider's alleged murderer has pulled down his pants and exposed himself as he appeared in court.

Roberto Urbano, 51, appeared in Melbourne magistrates court via video link on Monday after being charged with murder and intentionally causing serious injury.

HungryPanda rider Feng Jianming, 47, and another rider confronted Urbano after spotting him tampering with their bikes in Melbourne's city centre on Friday night, police allege.

After a fight broke out, Urbano allegedly stabbed both riders, with Feng dying at the scene.

The second rider, 34, suffered serious injuries and remained in hospital on Monday morning.

Appearing via video link, Urbano called out, "Objection, your honour!" before saying, "I'm the one who was injured".

The video link was muted but he continued to speak and gesture with both hands and stood up to walk around multiple times.

He then stood on the chair and pulled down his pants exposing himself to the courtroom before the link was cut.

The magistrate granted the prosecution's application to compel Urbano to have his injury to his right arm be photographed and his DNA extracted with a mouth swab.

His lawyer confirmed his client has schizophrenia and asked for the custody nurse to assess him.

The 51-year-old was arrested by police on Saturday and on Monday morning was charged with one count of murder and intentionally causing serious injury.

Investigators were granted extra time to build their case due to multiple witnesses requiring translators and more than 30 CCTV cameras needing to be canvassed, containing hundreds of hours of footage.

Feng, originally from China's Shaanxi province, had been in Australia for about nine years.

His wife, Xu, their parents and two children all relied on his work to get by at home.

The news of Feng's death reverberated through Melbourne and gig worker communities in Australia and abroad.

Mourners left floral tributes and notes near the state library over the weekend in his memory.

Some cards expressed sympathy for his family, while others vented grave frustrations with messages such as "city of criminal" and "Asian lives matter".

A GoFundMe fundraiser set up by the Melbourne Chinatown Business Association had raised almost $390,000 by Monday morning to help Feng's family with emergency travel and funeral expenses.

The head of the Melbourne Chinatown Business Association, Christina Zhao, said Feng's passing had weighed heavily on his colleagues and gig worker communities in China, Japan and Korea.

Food delivery company HungryPanda said it was assisting the family with visa arrangements, funeral expenses, financial support and insurance.

The Transport Workers' Union said HungryPanda need to confirm they properly assessed risks to their workers.

"HungryPanda has legal obligations to do whatever it can to minimise risk as food delivery riders carry out their work," the national secretary, Michael Kaine, said on Monday.

"It must urgently confirm whether it has done this, and we are calling on WorkSafe to investigate whether it has failed in its duties here, as we have seen in the past with its failure to report a workplace death."