In a mad rush to the stage at a Howard University homecoming concert featuring Big Sean, eight were left injured, including two D.C. police officers, the Washington Post reported.

The crowd was reportedly growing unruly because they could not get into Yardfest, held Friday, the school's annual outdoor hip-hop concert festival. Normally offered for free, entrants were charged five dollars this year.

Officer Paul Metcalf, a D.C. police spokesman, said the rush of people "created a public safety hazard" when authorities responded initial reports of attendees rushing the gates around 3 p.m. All injury victims were taken to the hospital, but none were in critical condition.

Keith St. Clair, a spokesman for the deputy mayor of public safety, said the concert was delayed at least an hour while authorities quieted the crowd and tended to the injured.

Howard spokeswoman Kerry-Ann Hamilton said this was the first time the school enforced crowd size for the concert. They determined 14,000 could safely attend and noted past events did not do the same. The concert sold out Thursday.

Internet footage taken by the attendees shows the crowd being highly restless and climbing the gates to get in. Hamilton noted people without tickets caused the rush, but a lot of ticketholders were likely caught in the crowd.

(Video contains at least one instance of foul language.)

The event started at 4:30 p.m. with Detroit rapper Big Sean. The event was scheduled to feature 2 Chainz, Juicy J and A$AP Ferg, but they did not perform and the event was ended soon after 6 p.m.

WJLA reported once 2 Chainz was announced to be part of the show, tickets sold out rapidly and were being scalped outside the gate at a higher price.

"We're all upset about having to pay," said Savannah Bowen.

Started some time in the early 80s, the concert has always been free and has featured acts like Jay Z, Puff Daddy (now known as Diddy), LL Cool J, Sugar Hill Gang, Notorious B.I.G. and more.

"We got a legacy built," Howard senior Justin Dean said, "always the biggest Homecoming every year."