CABARRUS COUNTY, N.C. -- Concerns over a bomb threat closed schools across Cabarrus County on Thursday.

Police said the anonymous threat was sent to the school district office. All 10 high schools and one middle school dismissed early out of "an abundance of caution," according to police.

Thursday afternoon, authorities gave the all clear after sweeping through each of the school buildings.

Several parents said it’s better safe than sorry, especially in today’s climate. They said closing the schools was the right decision.

RELATED: Police, FBI investigate following Cabarrus Co. school threat

“There was an announcement they said everyone had to get out of the school,” said one student at Cox Mill High School.

Thursday morning, Concord Police tweeted that a threat let to the high schools dismissing early across the county. J.N. Fries Middle School closed for the day, too.

“Oh gosh, I’m very concerned,” said Tracy Ashworth, who was picking up a grandchild at Cox Mill High School.

“I feel safer now that we’re leaving,” says student Ava Douglas.

The school district said it was a precautionary measure after a joint decision with law enforcement. Thursday afternoon, police confirmed an anonymous threat was sent to the district office referencing explosive devices.

NBC Charlotte talked to parents worried about the worst case scenario.

“Every day we’re worried about that, considering what’s going on everywhere,” said Amy Cennamo.

“Better to be safe than sorry,” says Ashworth. “With the way things are nowadays, you don’t know what’s going to happen.”

After sweeping through each of the school buildings, authorities gave the all clear. Now, the FBI is getting involved in the criminal investigation as well.

Authorities say they will release additional information when it’s an appropriate time.