A teenager was allegedly punched and slapped by another youth who then ordered him to transfer £400 into his bank account.
Police were called and a 17-year-old suspect was arrested on suspicion of robbery after he was located nearby.
The incident happened in Nottingham Road, Southwell, shortly before 11am yesterday (Saturday 28 August).
Detective Sergeant Jackie Price, of Nottinghamshire Police, said: “This was an appalling incident in which the victim was punched in the chest and then slapped around the face as he waited for a bus.
“The offender demanded he transfer £400 into a bank account and threatened to stab him if he did not do so, although no knife was seen during the incident.
“Nottinghamshire Police treats reports such as this extremely seriously and officers did well to quickly arrive at the scene and locate the suspect in a nearby building.
“Whilst we have made an arrest, our enquiries are at an early stage and I would ask anyone who witnessed what happened, or has dash cam footage, to contact police on 101 quoting incident number 255 of 28 August.”