IDAHO FALLS - An overheated circuit breaker was the reason employees at one Idaho National Laboratory building had to evacuate Wednesday evening.

Several employees stood outside in the bitter cold as fire crews cleared the building.

At first, it was reported smoke was seen in the building around 5:00 p.m. A half-an-hour later, workers who had not decided to leave for the day were allowed back in the building.

No one was hurt. Estimated damage was not released.