LUNENBURG COUNTY, Va. (WRIC) — All Lunenburg County public schools were closed Monday, Sept. 12 due to a threat, according to the school district.

The school posted on Facebook at 8:02 p.m. Sunday, writing that the school board meeting scheduled for Monday would be postponed, all school offices would be closed and that all after-school activities were canceled due to “unforeseen circumstances.” The school did not provide any additional details until 1 p.m. Monday, at which point it was clarified the decision was made to close all schools due to “a threat that involved the school system.”

In the post, Lunenburg said that law enforcement asked the school to “not share details of the threat because it would compromise the investigation.” The school district said there was concern that giving the public too much information could make it harder to catch the suspects.

“Please understand that while we want to be transparent and communicate with families as quickly as possible, addressing the threat and finding the person(s) responsible was our primary goal,” the school district wrote in the second Facebook post on Monday afternoon. “We appreciate the patience of our parents and employees while we have addressed the situation. The investigation is continuing, and the Sheriff’s Department hopes to have a resolution soon.”

The Lunenburg Sheriff’s Department is working alongside Virginia State Police in the investigation. Lunenburg County Public Schools will be open with normal hours Tuesday, Sept. 13 with an increased police presence.