As a suspect carried out a savage attack at Ohio State University on Monday, members of the U.S. military in one classroom heroically stood by the door to protect others, a student told CNN.

“We have quite a few military men in our class, who are actually all standing by the doors, keeping us safe,” OSU student Molly Clarke said. “I’m feeling pretty good about that.”

Ohio State University student says some military members in her class are standing by the door to protect others https://t.co/vVyHZnX2Wo pic.twitter.com/MmMnGIiAQn — CNN (@CNN) November 28, 2016

It’s possible Clarke was referring to Ohio State ROTC cadets.

The suspect in the attack reportedly drove his car into a group of pedestrians and then used a weapon to cut several victims, according to Ohio State University President Dr. Michael Drake.

Ohio state police confirmed a butcher knife was used in the attack. The suspect was killed by police and officials believe they have secured the scene.

BREAKING: Ohio State police: Attacker purposely drove over curb into pedestrians, got out and stabbed people with butcher knife. — The Associated Press (@AP) November 28, 2016

Multiple news outlets reported that the suspect is believed to be a 18-year-old Somali refugee and OSU student.

UPDATE: A 20-year-old Somali man is the suspect in the Ohio State University attack https://t.co/G7ANHT8lbn pic.twitter.com/kdOzF7aWiV — CBS News (@CBSNews) November 28, 2016

Police have yet to identify the suspect or a possible motive.