Eric Delgado, 20, was shopping with friends inside the mall when he heard a gunshot and saw the gunman. After Delgado saw the gunman, he along with seven others hid in a dressing room for 45 minutes and heard a second gunshot.
"He didn't seem that he wanted to kill anyone because he clearly could of because there were people two feet in front of him that he could have shot at, but he didn't shoot at them. Instead he shot toward the ceiling. ..." Delgado said.
A staging area has been set up near Chili's Grill & Bar for family members to be reunited with anyone inside the mall during the lockdown.
Law enforcement officials have been informed by management of the Garden State Plaza Mall that it will be closed today. No word on when it will reopen.
The Garden State Plaza Mall, about 25 miles west of New York City, has more than 300 retail stores, including Neiman Marcus, Nordstrom, Lord & Taylor, Gucci and Louis Vuitton.
ABC News' Josh Haskell contributed to this report.