Sheneca Cowart faces multiple felony gun charges following the incident at The Academy of McCrory Lane on Thursday.

A Tennessee teacher has been arrested after she allegedly threatened to shoot a colleague in the preschool where she worked, police said.

Sheneca Cowart was charged with assault, threat of mass violence at a school and two counts of carrying a weapon onto school property following the Thursday incident at The Academy of McCrory Lane in Nashville.

Authorities took Cowart into custody after witnesses said she threatened to "retrieve a firearm and made threats against another teacher and the school after an argument," the Metro Nashville Police Department said.

Staff members alleged 29-year-old Cowart threatened to “shoot up” the preschool and that she keeps a gun “on her,” according to NBC News affiliate WSMV.

Another teacher claimed to overhear Cowart say “when I start shooting, you better run,” prompting the preschool to go into lockdown, WSMV reported.