On Monday afternoon, police were looking at surveillance tapes to see if there was anybody suspicious inside the mall but they assured shoppers that the area was safe.
It was just before 11:00 a.m. when mall tapes appeared to show two men enter the mall, one appearing to have a handgun.
Police were brought in to thoroughly check the mall. Shoppers continued to shop for about an hour before police closed the mall to make it easier to shop. Thee hours later, the police say they did not find anyone and the mall reopened.
Mall officials say safety comes first over three hours of lost revenue.
"Our initial response was unable to locate the individuals. The citizen seemed fairly credible to us so it seemed right to do a thorough search of the mall," said Sgt. John Nebl, Schaumburg Police Department.
"Monday is traditionally one of the slowest days of the week so I don't think it would be that drastic of an impact," said Marc Strich, General Manager, Woodfield Mall.
Mall officials say that they have drills for such an incident and just had a drill this past October.