A bomb threat prompted an emergency evacuation of Palo Verde East residence hall on Wednesday at around 4:15 p.m.
The Residential Life staff at the residence hall called ASU Police after they were alerted to a note that said there was a bomb in the building, said Leah Hardesty, an ASU spokeswoman.
Dominique Watkins, a community assistant in Palo Verde East, said two residents approached one of his co-workers with the note they found in an elevator in the residence hall.
A fire alarm was then pulled to evacuate the building, Hardesty said.
Police arrived and searched the building, but no suspicious devices were found, she said. Everyone was able to re-enter the building within a half-hour.
No text-message notification of the incident was sent out to students because everything happened so quickly, Hardesty said.