ARDEN-ARCADE — A suspect was arrested as authorities investigated a bomb threat at a Sacramento library, officials said Tuesday.

The Sacramento County Sheriff's Office identified the suspect as Robert Eric Matheson, 54.

The Arden-Dimick Library at Watt and Northrop avenues was evacuated at around 4:30 p.m. after a person told an employee he had a bomb, authorities said.

A bomb squad located the device and determined it was not a threat.

Afterward, during a search of Matheson's home in the La Rivera neighborhood, the sheriff's office said investigators located a live device with two pounds of explosive material.

No further details have been released.