Fake bomb/threat phone calls hit three Oahu schools, but police say none of the threats were credible.

• Punahou, Iolani, and Waikiki Elementary all got anonymous phone threats the same day.
• Punahou said its call came from out of state.
• Police investigated and found no credible danger at any of the schools.
• This fits a pattern of similar hoax calls hitting Hawaii schools recently.

Outlook: Expect schools and police to keep tightening security checks as these hoax calls continue.