For the third time in a month, a teenager wearing headphones while walking down a Brookfield street has been robbed.

The most recent incident occurred just before 4 p.m. on Thursday in the 3800 block of Park Avenue, according to a community alert issued by Brookfield police Thursday night.

Police say that a 15-year-old Brookfield boy was walking down the sidewalk when he was approached by a man on a bicycle. The man asked the boy for directions to the Memorial Circle and then suddenly stated he had a gun and demanded the boy’s iPod, which was in his pocket. The boy handed over the device, and the man left the area on his bike.

The man appears to have targeted the victim, because at the time of the incident the boy was wearing ear buds attached to the iPod in his pocket. The man also apparently followed the boy for a time before robbing him. The boy told police that he first noticed the man on the bike on Fairview Avenue just after parting ways with a friend.

Police said the offender was described as a black male with a thin build and short black hair, about 20 years old, wearing a navy blue jacket and blue jeans. He was riding a navy blue mountain bike with white lettering on it.

On April 22, two boys who were skateboarding near the corner of Southview and Prairie avenues were robbed by three men in a car. One of the victims, a 16-year-old boy, had headphones on. One of the offenders pulled a gun on the boy wearing the headphones and demanded his iPhone.

Meanwhile, three men accosted a group of youths in Brookfield on March 26, targeting the one who was wearing headphones. The teen was beaten him and his iPhone taken from him. Three people have been charged with robbery in connection with that incident.

Anyone with information is asked to call the Brookfield Police at 708-485-8131.