SULLIVAN COUNTY, Tenn. (WJHL) – The Sullivan County Sheriff’s Office (SCSO) is investigating after a staff member at a local school was injured Monday.

According to a release from the SCSO, the school resource officer assigned to Sullivan Heights Middle School was informed that a staff member had been injured around 11:30 a.m.

The sheriff’s office responded to the school on Moreland Drive to assist in an investigation and determine how the staff member was injured.

“At this time, there is no evidence to suggest that a student is involved; however, the investigation remains ongoing,” the release states.

Courtney Carty is the mother of a student that was stuck in her math class for about three hours.

“The incident happened, apparently around 11. We weren’t even partially notified till after two or around two. That’s a long time for something to be going on and not inform parents,” Carty said.

Carty said that she received a voicemail at approximately 2 p.m. that stated, “Sullivan Heights was placed on a hold this morning due to a medical emergency for a staff member. Lunches have been served in classrooms as we deal with this emergency.”

Parents from both Sullivan Heights and the nearby Rock Springs Elementary said that their children were on lockdown for several hours.

Carty said she found more information on social media, but couldn’t verify any of the reports.

“There were so many conflicting stories that there had been a stabbing that there was a you know, a teacher stabbed a student stabbed, they didn’t know what was going on, where just the information was so conflicting,” Carty added.

This is a developing story. Stay with News Channel 11 online and on-air for updates.