Rochester Police Department says no credible threat was found following a bomb threat at Rochester High School Thursday morning.

Police say officers were called to the school around 11:30 a.m. after staff reported the threat. Officers, along with deputies from the Sangamon County Sheriff’s Office, responded immediately, while school officials evacuated students and staff.

The Illinois Secretary of State Bomb Squad, including K-9 units, conducted a search of the building and surrounding grounds. Authorities say that search determined there is no credible threat at this time.

The incident remains under investigation with assistance from the FBI’s Joint Terrorism Task Force.