Police are investigating two separate robberies near the University of Newcastle's Callaghan campus overnight.
At about 5.40pm on Sunday, a 22-year-old man was walking across a pedestrian footbridge over the Newcastle Inner City Bypass towards Michael Street, Jesmond.
Police have been told he was knocked to the ground by an unknown male and assaulted, before the man stole his iPhone and bag and fled the scene towards William Street.
The 22-year-old was assisted by a member of the public who contacted police.
Police would like to speak to man who may assist with inquiries.
He is described as being of Caucasian in appearance, approximately 18-years-old, between 165-170cm tall, with a solid build and short black hair.
About 1am, Monday, November 11, a 25-year-old man was walking towards Warabrook Train Station when he was approached by a group of four males and two females.
Police have been told one of the men threatened him with a knife and demanded cash and cigarettes.
He handed over a sum of cash before the group fled in a westerly direction.
Officers from Newcastle City Police District have commenced investigations into both incidents.
Police do not believe they are linked at this time.
Anyone who may have noticed unusual activity in the area between 5.30pm yesterday and 2am today, or who may have dashcam or CCTV footage is urged to contact police.
Anyone with information about this incident is urged to contact Crime Stoppers on 1800 333 000 or online