Police are searching for a gunman inside the Westfield Garden State Plaza Mall in Paramus, N.J., law enforcement sources say.
The mall was closed as police responded. Officers from Paramus and neighboring municipalities swarmed the scene, along with State Police and SWAT.
Witnesses told NBC 4 New York a man dressed in all black, including a black helmet, was carrying a rifle and started firing shots inside the mall.
"He was fully armored head to toe, like he planned this. Like it's not like a random thing," said a male shopper who did not want to give his name.
"I'm fine, but this is crazy," he added.
It wasn't immediately clear if anyone was hit.
Westfield Garden State Plaza is located at the intersection of Route 4 and Route 17 near the Garden State Parkway. It includes over 200 stores and 50 restaurants and eateries.
-- Ida Siegal contributed to this report.