UPDATE: Williamson County Jail is all clear and back to normal activities.
The Williamson County Jail is on lockdown due to a bomb threat.
Sheriff Robert Chody posted on his Facebook page that a bomb threat had been called in and that precautionary measures were being taken.
Sheriff Chody says that a bomb dog is enroute and that staff are checking buildings and lobby areas and the outside.
FOX 7 has a crew on the way and will update this story as more information becomes available.