Marty, who didn’t want to provide his surname, told 9News he was cycling across the Evan Walker Bridge to Flinders Street Station when he was approached by two young people.

“Just walked up and punched me in the jaw,” he said.

The Carnegie man called Triple Zero but the pair then returned and threw his phone in the Yarra River.

“It had pictures of my deceased mum on it and other things that are irreplaceable,” he said. 

The customer service worker was taken to hospital after his tooth was knocked out and he suffered bruising to his face.

“I felt my mouth and my hand was just, yeah, there was a lot of blood coming out,” he said. 

He said violence in Melbourne’s CBD appeared to be growing by the day. 

“The random crime is just ridiculous, like me going out enjoying a night and that happened, it’s really wrong,” he said.

Marty describes the group as being in their late teens to early 20s, wearing jeans and Hoodrich branded jumpers.

Police have made no arrests and the investigation is ongoing. 

“They really need to get a life, they can’t go around doing that,” Marty said.