Thomas said a decision about the rest of the week’s classes will be made later.
“We are all devastated by this tragedy,” he said.
Rausch said that officers ordered him out but he refused and fired shots, prompting one officer to return fire.
The gunman died at the scene, according to Rausch. He was identified as a student at the school but his name has not been released.
‘Our worst fear’
The investigation is continuing and the findings will be shared with the local District Attorney, Rausch said during the press conference.
Rausch said this is not a “school shooting” but is an “officer-involved shooting at a school,” noting that the distinction is important.
“It’s our worst fear, an active shooter in a school,” Knoxville Police Chief Eve Thomas said during the press conference.
Austin-East Magnet High School is a Title 1 school, which is a federal program providing financial assistance to “schools with high numbers or high percentages of children from low-income families,” according to the US education department.
The school’s website says it has “a performing arts focus that offers resources including visual arts, CTE and rigorous academic courses.”
Responders trained for incidents like this
The injured officer is “conscious” and “going to be OK,” Kincannon said, adding that she spoke with him and he was in good spirits.
“I thanked him for putting his life on the line to protect the students and staff at the school, and he said he’d rather he be hurt than anybody else,” the mayor said.
The Knoxville Fire Department has trained for these kinds of incidents.
Fire Department Captain Corcoran told CNN in an email that the department co-trained with the KPD’s SWAT team for incidents like this, “entering into a potential hot zone where it’s unknown if there is still an active shooter on the loose”.
“Unfortunately that training was used today when responding to Austin East high school,” Corcoran said. “As far as our response to the incident, it was a successful one.”
CNN’s Amir Vera contributed to this report.