NASHUA, N.H. >> Police who investigated threats to hurt students and teachers at schools in the state's second largest district concluded Monday that they weren't credible and that schools would reopen Tuesday.
The threats to the Nashua school district were made by email to an administrator Sunday and were specific enough for officials to shut down all the public schools.
Nashua Police Chief Andrew Lavoie said at a briefing Monday afternoon that police have determined there is no longer a credible threat at the schools.
"We've checked the schools, and we're going to have an increased presence (Tuesday)," Lavoie said. "We've found no devices."
Some private schools in the southern New Hampshire city also closed Monday, though police say only the two public high schools were mentioned in the threat. Nashua serves about 11,500 students, including more than 3,500 in the high schools. The schools will be open Tuesday and Wednesday before closing for the Christmas break.
The closing comes less than a week after threats of violence shuttered schools in Los Angeles, the nation's second largest district. A rash of threats followed in several other large school districts, including New York City, Miami, Houston and Las Vegas. Most of the school districts remained open, though some added police patrols.
The threats in New Hampshire also came with the country still on edge following the killing of 14 people in what authorities say was a terrorist attack Dec. 2 in San Bernardino, California.
School Superintendent Mark Conrad said the events of the past several weeks were on his mind when he met with police, school staff and the board of education Sunday and decided to close all the schools.
"Our parents are very concerned about the safety of their children," he said. "It was very clear to me that in other schools, we would have had a very high level of absenteeism and a very high level of anxiety."
Police are still working with the FBI to determine who sent the threat.