A Republic boy said he'd shoot up a school with an AK-47, police say. He's been arrested.

A 13-year-old said in a video sent over social media that he would shoot up a school with an AK-47, police say.

The Republic boy was arrested early Sunday morning for making a terrorist threat, according to a news release from the Republic Police Department.

Police seized guns and other evidence from the juvenile's residence, and an investigation is ongoing, the release said.

The video in which the boy made the threat was originally sent to another person late Friday night but was not reported to authorities until early Saturday evening, police say.

With assistance from the Republic School District, police quickly identified the juvenile and obtained a search warrant for his residence, the release said.

The boy was arrested at 2:37 a.m. Sunday and was taken to the Greene County Juvenile Detention Center, police say.

"The safety and security of students and school staff is of utmost priority for the Republic Police and Republic School District. It is important for students and parents to immediately report threats like this to law enforcement so a proper investigation can be conducted," the release said.

The threat was not targeted at a specific school, Lt. Timothy Wheeler told the News-Leader in an email.

Reached by phone, Republic Schools Superintendent Chance Wistrom said the 13-year-old boy who was arrested attended Republic Middle School.

Wistrom said staff will meet before school starts Monday morning. They will receive talking points for conversations with students, including the facts of the incident, proper procedures for reporting threats and assurance that "the process worked," he said.

"We want students to know we're all in this together," Wistrom said. "We need to be aware of any concerning incidents, no matter how big or how small."

Wistrom said parents should encourage their children to be "proactive... and understand the role we all play in safety."

"I think we need to continue to remind our kids, not to be scared, but certainly to constantly be aware of their surroundings," Wistrom said. "If something doesn't seem right, perhaps it's not."

Wistrom commended the individuals who reported the threat to authorities and thanked the Republic Police Department and the Greene County Juvenile Office for reacting quickly and moving forward with the investigation.

At noon Sunday, the Republic School District sent an email to employees and students' families.

The email said the school district will assist police as needed.

"The safety of our students and employees is our number one priority, and to ensure this safety we must all work together," the email said. "We must continue to encourage each other to be aware of potential safety threats and report them, as in this case. This awareness and subsequent action is the best defense in keeping our schools safe."

More: UPDATE: Fewer gun-free zones or fewer guns: Missouri lawmakers split on what's safer

The threat comes less than a week after a school shooting in Florida left 17 students and faculty dead.

Days before the shooting in Parkland, Florida, a Hillcrest High School student was suspended after school officials say he created a meme with a gun and a vague threat. Springfield Public Schools said it was determined there was no validity to that threat after numerous interviews with students and parents.

In 2017, several schools were made the target of threats, including Springfield's Kickapoo and Glendale and area high schools in Nixa, Conway and Republic.

More: Springfield doctor dons Trump mask for City Hall protest after Florida shooting

More: Springfield area leaders react to Florida school shooting