The robbery occurred on Main Street at 12:48 a.m.
Police said the victim, whose identity was not released, was approached by a man wearing dark-colored clothing outside the Nutty Irishman, a pub on Main Street. The man asked for $40, police said. Police said the victim refused to give the man money, but offered him a ride home. The suspect agreed.
En route to the car, however, police said the suspect "began punching" the victim, then threw him to the ground -- and rifled his pockets, taking the phone. The robber then ran.
Police said it was not clear if either man -- or both -- had been a patron at the bar.
Police ask anyone with information about the robbery to call Crime Stoppers at 800-244-TIPS. All calls will remain confidential.