Here in the Treasure Valley, four schools had to be evacuated and later in the day, three businesses on Eagle Road also received threats.
Those bomb threat calls continued late into the night and have resumed late Friday. Officials tell KBOI that several schools received similar bomb threats at about 11 a.m.
The Meridian School District reported four bomb threats Friday.
Boise State University was also a target, but that , too, turned out to be a hoax. The caller in this instance phoned the university's main switch board.
Dispatch in Twin Falls reported around 9:15 p.m. Thursday another bomb threat was called in to St. Luke's Hospital.
Back here in the Treasure Valley, the investigation is just getting started to track down who made bomb threat calls to various schools and stores throughout the day.
"There are ways to find out who is responsible for these hoaxes," said Lynn Hightower the Boise Police Department spokeswoman.
Boise Police won't go into detail about how they are planning to identify the person or people who made the bomb threat calls, but they have enlisted the FBI in a massive investigation.
One of the first things police are doing is tracking phone calls and trying to find a motive.
Here's something to consider: All the schools that received a bomb threat were giving the I-SATS, a state-wide standardize test.
"It's not the type of thing that whatever your motivation is, we want in our community. We are going to find whoever did this and hold them accountable," Hightower said.
In the past, both adults and minors have been arrested for bomb threats. So even if your under 18, it's still a felony crime and could get you up to 5 years in prison.