The building was evacuated Wednesday morning.
There was another bomb threat at a North Dakota airport. The threat to the Byron Dorgan Terminal in Grand Forks, N.D. was made at around 9:40 a.m Wednesday. In response to the threat, the building was evacuated.
Late Tuesday, Fargo police responded to Hector International Airport after a bomb threat made over the phone.
Police and the FBI are currently investigating the incident.