The incident happened at approximately 1:39 p.m. at the Maryland Park Apartments, located on the 700 block of Robinson Lane.
New Castle County Police responded to the apartments after receiving a report of a robbery.
The 11-year-old victim told arriving officers that he was approached by two young males, one of which was brandishing a weapon. One of the suspects demanded the victim's cellphone and both then fled on foot.
The boy was not injured in the incident.
Both suspects are described as black males, 13-14 years of age, thin build, 100-110 pounds, 5' to 5'5'', with brown eyes.
Police are asking anyone with information in reference to the incident, to please contact the New Castle County Police Department at 395-8110. You can also submit crime tips anonymously by going to www.NCCPD.com and following the link for Tips and Alerts.