Some scary moments at Omaha's annual Septemberfest celebration when occupants of two vehicles began firing at each other in the parking lot outside the Qwest Center Sunday night. No one was hurt.

A witness says two cars drove up next to each other and exchanged 20 to 30 shots. After that, most of those in the crowd inside the fence at Septemberfest, ran.

Witness Kevin West says, "I ducked behind a car along with a lot of other people. And then after the shots were fired, all of a sudden everybody just scattered everywhere. Chaos erupted, fights broke out."

Dozens of police officers arrived to control the crowd, and several fights broke out. Witnesses reported officers using mace and a Channel 6 News crew saw at least one person get Tasered.

Police say they may have to review security for Monday.

Omaha Police Lieutenant Mike McGee says, "Definitely have to take a look and see what plans we have in place. We did have a number of officers down here tonight as well. We'll see if we need revamp our plan at this point in time."

Police took several people into custody for questioning. A juvenile was booked on a gun charge.