A gunman killed a student at an Oregon high school Tuesday morning and later was "confirmed deceased," authorities said.
SWAT teams descended on Reynolds High School in Troutdale, a city near Portland, Oregon after receiving a report of a shooting, Troutdale Police Chief Scott Anderson said. He said a room-by-room search was underway at the school outside Portland.
Reports say the shooter entered the building and fatally shot the student. Authorities confirm the gunman is dead, but have not yet revealed whether that shooter committed suicide or was fatally shot by police.
"This is a very tragic day, one that I had hoped would never ever be part of my experience," Schools Superintendent Linda Florence said. "We feel very sorry for our parents."
She said the students were "absolutely wonderful" at evacuating the building.
The shooting took place just as the school day was beginning, officials said. The school year had been scheduled to end Wednesday.
"We are still checking the building," Sue Strickland, police records specialist for the Troutdale police, told USA TODAY. "We have about 40-50 units out there. We have several SWAT teams in the building right now and they are checking to make sure that they've got things under control. A semi-automatic weapon was used."
Reynolds track coach Todd Rispler told KGW-TV he was grazed on the hip but was not seriously hurt.
Freshman Daniel DeLong, 15, told the Associated Press he saw a physical education teacher at the school with a bloodied shirt.
"I'm a little shaken up," DeLong said. "I'm just worried."
He said he was texting friends to make sure they were all OK.
"It just, like, happened so fast, you know?" he said.
Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives are heading to Reynolds High School to assist in the investigation, the ATF said Tuesday on its Twitter feed.
KGW-TV has a live stream of the situation available here.
Mayor Doug Daoust told MSNBC that gunshots were heard and students fled the building just as school was to begin. Students were evacuated from the school and later were released to their parents in a parking lot.
The school, which includes grades 9-12, has more than 2,800 students. Troutdale, an eastern suburb of Portland, is home to about 16,000 people.
At least one student tweeted that the school was in lockdown and a number of police cars have rolled up. A second student has tweeted that she heard gunfire. A third reported a police officer racing towards the school's gymnasium.
A parent, Dawn, told KGW that her son Josiah was safe, but knew nothing of the situation.
"I just heard he was okay but he doesn't know what's going on. I just want to see him to make sure he's okay. To personally see him. I'm scared. I just don't know what to do. I didn't know where to go. I just came here. Some people got texts. Some didn't. So we just wait."