Schools are closed in one New Hampshire city following threats received, in a manner not unlike warnings given last week to school systems around the country prompting officials increased vigilance or stopping classes.

FOX's Eben Brown reports:

A warning sent to school officials in Nashua, New Hampshire, forces them to cancel all classes today... Parents are unnerved, but understand...

(Parent) "There are so much schools going on, I mean, sending my son to school and not having him back, it's scary."

(Parent) "I love my kids to death. I could never see myself without my kids. I will die with them!"

No determination yet if the threat was credible... Mark Conrad is the school's Superintendent in Nashua...

(Conrad) "We're going to do everything we need to, to be able to reassure our staff, our students, and our parents that it's safe to be in our schools."

Eben Brown, FOX News.