With wild screams in the background and as blood was being spilled, a bus driver made the desperate call to police to rush to almost 20 of his passengers involved in a brutal brawl.

Blood-curdling screams can be heard as Singh tells authorities “the situation is getting worse”.

“More people can get stabbed or whatever … like, you know, they are fighting … seriously,” he says in the triple zero call.

Nineteen people, including teenagers as young as 13, were arrested.

”I thought like they were going to throw stones or like they got a knife, [that] sort of stuff,” Singh said.

“There were like 20 people, so I was scared.”

He had picked up the two groups in the city and within minutes the brawl broke out.

Singh eventually fled the bus, fearing for his safety.

Two or three other passengers who were not involved in the fight went with him.

Witnesses said some in the brawling groups gathered rocks from the roadside while others ripped seats from the bus and used them as weapons.

One women suffered head injuries and two others were taken to hospital with minor injuries.

Several teenagers were among those arrested, with the oldest of the group aged 58.

Singh was not injured, but the bus was badly damaged and areas covered with blood.

Those arrested were charged all with aggravated affray and damaging property.

They were barred from public transport for three months and were granted bail to appear in court later.

Police are investigating.