The alarm came just before 9.30 pm on Saturday.
Staff at a petrol station on Östra Storgatan in Sölvesborg had been threatened by a knife-armed and mouth-guard masked man.
However, the perpetrator must not have come across any money during the robbery.
However, the police write on their website that he "got goods with him", without specifying further.
About 40 minutes after the incident at the petrol station, which the perpetrator left on foot, an arrest could be made.