An active shooter has been reported at the Ohio State University campus and people have been told to take shelter.
Students were told: “Run Hide Fight” in a tweet, as police rushed to the scene.
At least seven people were injured and sent to hospital, the fire department said.
Two were reported in a stable condition, while there were no details on the other five.
Local reports said SWAT teams and other armed police are on campus in Columbus as officers on loud speaker are warning students that the gunman is at large.
The university’s Emergency Management urged people on campus to “wait for police officers directions” and to contact police only with information.
“Run, hide, fight” is standard protocol for active shooter situations, meaning: “Run”, evacuate if possible; “Hide”, get silently out of view; or “Fight”, as a last resort, take action to disrupt or incapacitate the shooter if your life is in imminent danger.
With nearly 60,000 students at its main Columbus campus, Ohio State is one of America’s largest universities.