Two teenagers were injured, one of them taken to hospital, after “multiple fights” forced the closure of a Pittsburgh area shopping mall late Friday, police said. Separate groups of “young adults” got into a series of fights that led to police being called to the Monroeville Mall in Pennsylvania starting at 5:30 p.m. ET, Monroeville Police Chief Doug Cole said.

"It was really insane," eyewitness Cory Clemente told NBC News. "I ended up locked in American Eagle." Up to 1,000 teenagers showed up at the mall late Friday, security officers at the mall told the Pittsburgh Post-Gazette. One fight involved at least a half dozen people, Cole said, adding that a “male juvenile” had been injured and taken to hospital after the first fight while another was later injured. The mall closed early at 8:30 p.m. ET, he said, and multiple citations were issued for disorderly conduct.

Separately, police in Independence, Missouri were called after more than 100 teenagers were involved in a disturbance at the Independence Center mall at about 7 p.m. local time (8 p.m. ET), the local police department said.

In California, cops responded to reports of a shooting at the Arden Mall in Sacramento but the officers instead found there had been fighting in the food court.

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This fight at the mall is unreal — Cory (@cxryclemente) December 27, 2014

Shooting at Arden mall, and I'm stuck in Sears they're tryna be haters and not let me make my way to Macy's. I need my Armani — Cathlyn Marie (@cathlynXmariee) December 27, 2014

- Alastair Jamieson and Niven McCall-Mazza