Witnesses describe what they saw and heard after OSU attack

Students gather near the scene of an attack on the campus at Ohio State University on Monday, Nov. 28, 2016, in Columbus, Ohio. (Adam Cairns/The Columbus Dispatch via AP)

COLUMBUS, Ohio (WCMH) — Witnesses described hearing gunshots and sirens in the moments following the attack on the Ohio State University’s campus Monday morning.

PHOTOS: Attack at Ohio State

Sophomore Wyatt Crosher said he heard what he thought was gunfire coming from a class building.

“My roommate and I heard about three or four gunshots from across the street, and soon after, we heard a bunch of police and ambulances pull up across the street,” the 19-year-old said.

“I was going to class and just all the people were running and I was really nervous. I was like, ‘oh crap,’” said fifth year senior, Scott Bedle. “I saw people running, cop sirens, everything.”

“I heard like multiple gunshots, and I wasn’t sure if it was real or not,” said senior, Yoon Lee.

“It’s really scary,” said Rachel Lemaster. “We barricaded ourselves in our rooms, like we were taught, turn off all lights and just hunker down, but Kevin is looking out the window seeing what was going on.”

One student told NBC News she was walking down the street when she saw a car plow into a crowd of people who had evacuated an academic building during a fire alarm.

“This car just swerved and ran into a whole group of people,” said Nicole Kreinbrink. “It hit a cop really bad.”

Other students barricaded themselves in classrooms.

“I’m safe in a barricaded room,” Harrison Roth tweeted. “If you’re on campus, get in a room and stay safe.”