Galloway Township Police Chief Patrick Moran told The Press of Atlantic City employees at the Seaview Resort spotted the man at 7 p.m. Sunday. He was seen holding a long gun, possibly a rifle, and was wearing a hat and a bandanna covered his face.
The man exited the building and was not located.
Police and a State Police helicopter searched the area.
Officers reviewed the resort's surveillance video and hope to release a picture Monday.
Richard Stockton College purchased the resort in September and uses it as a learning lab. Its Bay Course is the site of the ShopRite LPGA Classic golf tournament.
Information from: The Press of Atlantic City, http://www.pressofatlanticcity.com