A student who witnesses say was the homecoming prince opened fire in his high school cafeteria, killing a young woman and wounding four other students before turning the gun on himself.
Three of those students are in critical condition Friday night - all with serious head wounds. CNN is learning more about the shooter who is said to be freshman Jaylen Fryberg. Students say he was very popular, played football and was recently named to the homecoming court.
So what made him commit this heinous crime? CNN's Kyung Lah digs into his social media profiles, which show a much more troubling side.
(CNN) - After Tuesday's shooting at an Oregon high school, many media outlets, including CNN, reported that there have been 74 school shootings in the past 18 months.
That's the time period since the December 2012 massacre at Sandy Hook Elementary School in Newtown, Connecticut, where 20 children and six adults were shot to death.
The statistic came from a group called Everytown for Gun Safety, an umbrella group started by former New York Mayor Michael Bloomberg, a passionate and public advocate of gun control.
Without a doubt, that number is startling.
So on Wednesday, CNN took a closer look at the list, delving into the circumstances of each incident Everytown included.
Everytown says on its web site that it gleans its information from media reports and that its list includes school shootings involving a firearm discharged inside or on school grounds, including assaults, homicides, suicides and accidental shootings.
CNN determined that 15 of the incidents Everytown included were situations similar to the violence in Oregon - a minor or adult actively shooting inside or near a school. That works out to about one shooting every five weeks.
It is a sickening image that has become all too familiar to Americans around the country.
Students walking single file, arms raised, after a gunman opens fire inside their school.
This time, it happened at a high school just outside Portland, Oregon.
Fatal Oregon high school shooting: 'This is not a drill'
One student was shot and killed, and a teacher was injured. Multiple law enforcement officials tell CNN the gunman is dead from a self-inflicted wound.
Reynolds High School student Hannah League shares what she experienced during the shooting.
Pamela Brown has the latest details.
(CNN) - A gunman opened fired Thursday at Seattle Pacific University, killing one person and wounding three before a student tackled him, Seattle police said.
The gunman was reloading a shotgun when the student, working as a building monitor, knocked him down, Police Capt. Chris Fowler told reporters.
"Once on the ground, other students jumped on top of them and subdued the shooter," he said.
The suspect, whose identity was not immediately released, is in custody, police said.
The shooting began inside the foyer of Otto Miller Hall, which houses the university's science, math and engineering departments, when the gunman confronted three people and shot them, Fowler said.View my Flipboard Magazine.
In Philadelphia, a student allegedly fired a handgun inside his high school gym, injuring at least two students.
2 students shot in Philadelphia high school gym; suspect nabbed
One suspect is now in custody, but police say they are searching for additional suspects as well.
CNN's Jason Carroll has the story OutFront.