NASHVILLE, Tenn. (WKRN) — Metro police are investigating after a “non-location-specific bomb threat” was emailed to Nashville Public Library (NPL).

Metro police told News 2 that around 10:30 a.m., library staff at NPL’s downtown location on Church Street informed them of an emailed bomb threat made toward no specific location.

According to police, officers and NPL staff members checked the downtown building for suspicious items, while officers from other precincts did the same at the other NPL branches throughout Davidson County. No suspicious items were found.

Authorities said due to an abundance of caution, library leadership personnel made the decision to close all library locations for the rest of the day on Thursday, Sept. 22.

Police called the investigation “criminal” in a statement released shortly after 2 p.m.

However, just before 3:45 p.m., Metro police tweeted that the investigation determined the threat probably came from outside of the state and it was not deemed credible.

NPL wrote on Facebook that all locations will reopen for regular hours on Friday, Sept. 23.

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This is a developing story. WKRN News 2 will continue to update this article as new information becomes available.