PERRY, Iowa (AP) — Multiple people were shot inside a small-town Iowa high school early Thursday as students prepared to start their first day of classes after their annual winter break, authorities said.

The suspect in the shooting in Perry, Iowa, has died of what investigators believe is a self-inflicted gunshot wound, a law enforcement official told The Associated Press. The official was not authorised to publicly discuss details of the investigation and spoke to The AP on condition of anonymity.

The official also said that at least one of the victims is a school administrator.

Two gunshot victims were taken by ambulance to Iowa Methodist Medical Center in the state capital of Des Moines, a health system spokesperson said. Some other patients were transported to a second hospital in Des Moines, a spokesperson for MercyOne Des Moines Medical Center confirmed, declining to comment on the number of patients or their statuses.

The state capital is about 40 miles (64 kilometres) southeast of Perry, which has about 8,000 residents.

High school senior Ava Augustus said she was in a counsellor’s office, waiting for hers to arrive, when she heard three shots. She and other people barricaded the door, preparing to throw things if necessary, with a window being too small for an escape.

“And then we hear ‘He’s down. You can go out’,” Augustus said through tears. “And I run and you can just see glass everywhere, blood on the floor. I get to my car and they’re taking a girl out of the auditorium who had been shot in her leg.”

In Washington, US Attorney General Merrick Garland was briefed on the shooting. FBI agents from the Omaha-Des Moines office are assisting with the investigation led by the Iowa Division of Criminal Investigation.

The shooting occurred in the backdrop of the Iowa caucuses and not far from where Republican presidential candidates were campaigning. GOP candidate Vivek Ramaswamy had a campaign event scheduled in Perry at 9 am about a 1 1/2 miles (2.41 kilometres) from the high school but cancelled it to have a prayer and intimate discussion, a spokesperson said.

Ramaswamy said the shooting is a sign of a “psychological sickness” in the country.

As of July 2021, Iowa does not require a permit to purchase a handgun or carry a firearm in public, though it mandates a background check for a person buying a handgun without a permit.

An active shooter was reported at 7:37 am Thursday morning and officers arrived seven minutes later, Dallas County Adam Infante said. He added during a news conference that officers located multiple people with injuries, but couldn’t confirm how many there were or their conditions.

An enormous number of emergency vehicles surrounded the building that houses both the town’s middle school and high school.