The courthouse building housing the central jury room at the Supreme Court complex in Mineola was evacuated for nearly half an hour late Tuesday morning after a phoned-in bomb threat, officials said.

A Nassau courts spokesman told Newsday a phone caller made the threat leading to the evacuation, but said a "thorough search" by court officers and other investigators found nothing suspicious.

Nassau County police said the State Supreme Court building at 100 Supreme Court Dr. was evacuated at 11:01 a.m., after the threat.

Police said officers from the arson-bomb squad also were dispatched to the scene.

At the beginning of the evacuation, court officers went from room-to-room telling people inside the courthouse, "This is not a drill."

Once outside, people were ushered through a light late-morning rain to an area across the street.

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People were allowed back into the building starting just before 11:30 a.m., officials said. There was a noticeable police presence in the lobby.

Jurors were told by officials to return at 2 p.m.