ORLANDO, Fla. -- People were trampled, bones were broken and at least four concert-goers were rushed to the hospital after chaos broke out at a concert at the University of Central Florida Arena.

The concert was part of the Rockstar Energy Drink Taste of Chaos Tour. Authorities say approximately 5,000 people attended and people at the event say a mosh pit got out of hand. Witnesses say more than 1,000 people were allowed in the pit, which got very rowdy and chaotic.

One person described seeing paramedics working on one of the injured.

"He came over on a crowd-surf, went on the floor and they were working on him for seven minutes," said the man.

Officials say three people were taken to a nearby hospital by ambulance and one woman was driven by her boyfriend. The injuries ranged from cuts to possible broken bones.

UCF officials quickly suspended alcohol sales at the event.