UPDATE 7:49 p.m.: Bluefield Police Department have deemed the threats to be non-credible.
Law enforcement say a juvenile female, Bluefield public schools student has admitted to being the one behind these threats.
The high schools and middle schools were targeted over a two day period.
Police say there were a series of threats conveyed through texts from a third party number to hide where the call was originally coming from. This caused the threats to appear to come from a veterans crisis hotline.
These hard to trace, internet based numbers helped hide the identity of the individual texting.
"Those calls come in, different types of threats towards the schools and everything, some were of school shootings, stuff of that nature,"said Detective Lenient Kenneth Adams. "At that point we go on high alert. Some of the threats of course you could tell were a prank, some you could not. We have to take these things seriously."
"Any time we have something like this happen, we take it very seriously," says Deborah Akers, the Mercer County Superintendent. "We immediately work with law enforcement to resolve the situation, and this has been resolved this morning."
The Bluefield police department stresses that the suspect's status as a minor doesn't mean there will not be consequences.
Investigators want to remind everyone that charges can be filed against juvenile.
Police say that they don't find any humor in prank calls about threats of violence targeting any public place, especially schools.
UPDATE 9:50 a.m.: Mercer County Public Schools said that police have investigated but found no threat.
MERCER COUNTY, W.Va. (WVVA) - Mercer County Public Schools released statements saying that threats were made against four schools.
The schools impacted by these threats are Bluefield Middle School, Bluefield High School, Princeton Middle School, and Princeton High School.
These statements were all made within an hour of each other. Police are said to be on scene at each school.
The threats are considered to be "unsubstantiated."
Stick with WVVA for updates on this developing story.