The shooter who killed six people at an elementary school in Nashville Monday has been identified as Audrey Hale, law enforcement sources told NBC.

The shooter had opened fire inside the private Christian elementary school, killing three children and three adults. Police received an active shooter call at 10:13 a.m.

Officers heard gunshots on the second floor and rushed to a lobby-type area where they came across the 28-year-old Nashville woman who had two assault rifles and a handgun.

Police said Hale once attended the school and an online profile listed her as working in Commercial Illustration and Graphic Design.

She was shot dead by police on site at 10:27 a.m.