Police say a misunderstanding prompted a lockdown and large emergency response at a Schaumburg office building Tuesday morning.
Schaumburg police were called to the scene around 11:30 a.m., located at 200 N. Martingale Rd., for a report of a man with a gun.
Footage from the scene showed roughly a dozen police vehicles surrounding the building and reports from inside indicated officers were sweeping the building.
About an hour later, authorities said the situation had been resolved and the lockdown lifted.
Officers discovered technicians in the building had equipment that was "misinterpreted as a weapon," said Sgt. Christy Lindhurst.
"There was no man with a gun and everyone has cleared the scene and resumed work," Lindhurst said.
Workers told NBC 5 that while this was a very scary situation, especially considering Sunday’s mass shooting in Texas, they said the person who called police definitely did the right thing.