UNION, N.J. (CBSNewYork) – A man was arrested Thursday night in connection to a false alarm that forced an evacuation at a New Jersey Walmart.

It happened at the store on Springfield Road in Union.

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Police got a call just before 11 a.m. Thursday from a person who saw a man wearing a mask and armed with what appeared to be a gun inside the store.

Employees got customers out of the store while multiple agencies responded. No gun was found and the store reopened Thursday afternoon.

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According to police, 20-year-old Joshua Phillips, of Newark, turned himself in to police Thursday night.

The Union County prosecutor’s office says the gun witnesses saw Phillips carrying was actually a large black airsoft gun. Phillips allegedly took the gun out of its packaging in the store.

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The incident happened just 12 days after a lone gunman killed 22 people at a Walmart in El Paso, Texas.