Cambridge Police report they are looking for three suspects who were acting suspiciously around a man's moped then, when the guy approached them, spotted his wife and took her phone, around 7 p.m. on Friday.
Police say the robbery took place at Tremont and Hampshire streets, outside the man's business.
The victims observed the suspects get into the passenger seat of a dark colored sedan. When the male victim confronted the motor vehicle, one of the suspects displayed a possible handgun. The vehicle then took a right turn onto Prospect Street towards Somerville. There were no injuries.
Anybody with information can contact police at 617-349-3300 or the anonymous tip line by calling 617-349-3370 or texting 847411.