POLICE are investigating after a group of four males robbed two people outside a Noble Park factory early Sunday morning.
The pair had left Yarraman railway station about midnight and were walking down a nearby alley towards Tower Court in Noble Park, when they were set upon by the group.
The four men — three described as Caucasians and one Sudanese — approached the pair from behind, surrounding and threatening them.
After one of the victims gave up a mobile phone, the group fled back towards the station.
Police are still investigating.
Anyone with information should call Crime Stoppers on 1800 333 000 or visit crimestoppers.com.au.