The Hanover County Sheriff's Office had an increased presence at Patrick Henry High School on Tuesday after becoming aware overnight of a threat made over social media.
It is unclear whether the threat was made specifically toward the county's Patrick Henry High School, or another high school by the same name elsewhere.
"It was a vague threat to a Patrick Henry High School," Sgt. James Cooper said. "We treated it as if it was directed at our Patrick Henry High School."
The investigation into the threat remains ongoing.
Hanover's schools are closed Wednesday through the weekend for the Thanksgiving holiday.
"The Sheriff’s Office would like to remind citizens that social media can have an expansive audience," a news release said. "We take all threats seriously, especially when associated with the safety of our schools."
Anyone with more information about the threat is asked to call the Hanover Sheriff’s Office at (804) 365-6140 or Crime Stoppers at (804) 780-1000.
You can also contact Crime Stoppers by going online to www.7801000.com or using the P3 Tips app for smartphones.
All Crime Stoppers methods are anonymous.