It happened around 5:15 p.m. Sunday at the intersection of 7th and Washington streets.
Officers responded to the scene to find a 35-year-old male with a gunshot wound to the leg.
A preliminary investigation indicates that the victim was attempting to buy drugs when three suspects approached him and tried to rob him.
One of the suspects pulled out a gun and fired at the victim who was trying to flee.
All three suspects, described as black males between the ages of 16 and 19, fled the scene. They were last seen wearing grey hooded sweatshirts.
As for the victim, he was taken to Christiana Hospital in stable condition.
Anyone with information is urged to contact Wilmington Police.