Emergency responders were dispatched to Howard University after several people were hurt on the 2400 block of 4th St. NW.
A mass casualty task force was called after reports that several people had been trampled at the gates of Yardfest, a day-long concert and the annual highlight of Howard Homecoming Weekend.
As many as seven people were injured, according to fire officials, and were brought to the hospital with non-life-threatening injuries.
Eye witnesses say thousands of people were still outside the gates, and reports say there was some pushing and shoving as well as dozens of gatecrashers climbing fences.
Yardfest has traditionally been free and open to the public, but this year the concert was a ticketed event.
People in the area are being asked to use caution.