Media outlets across the country, from New England to Wisconsin and California, as well as in the United Kingdom are reporting school evacuations because of threats.
Authorities in Colorado and New Hampshire say the threats led to the evacuation of schools.
A spokeswoman for the Colorado Division of Emergency Management, Micki Trost, says the threats made Monday appear to be related to the ones made at schools across the country.
In Colorado, an elementary school in the Denver suburb of Parker was evacuated after getting what Douglas County School District spokeswoman Paula Hans described as an automated phone message.
TheDenverChannel.com reported that Colorado Springs and Pueblo schools were also evacuated, and that in Pueblo, the county sheriff's office reported the incident to the FBI and Joint Terrorism Task Force. The Chieftan said a bomb squad was at the scene.
In New Hampshire, police say Portsmouth High School, Fuller Elementary School in Keene, Berlin Middle School in Berlin, and Amherst Street Elementary School in Nashua received threats Monday.