UPDATE: June 6, 2014 - 7:45 a.m.
Seattle Police say a student at Seattle Pacific University was a hero during yesterday's shooting.
Seattle Police Captain Chris Fowler tells NBC's "Today" the student monitor jumped into action and helped save lives.
"A student monitor who works inside of that the facility, observed the suspect reloading the shotgun, pepper sprayed that person, and then got them to the ground," police say.
Police say the suspected gunman, who allegedly killed one person and wounded three others at Seattle Pacific University, is not a student there.
Investigators believe 26-year-old Aaron Ybarra acted alone before he was subdued by students and staff at Otto Miller Hall Thursday afternoon.
Police say Ybarra confessed to the shooting after he was arrested and told officers he expected to die.
Unnamed police sources tell a Seattle TV station that Ybarra was obsessed with the 1999 Columbine school shootings and even traveled to Colorado to see the site for himself.
A 19-year-old male student was killed and a 20-year-old woman was critically wounded in yesterday's rampage.
Police say they one suspect in custody after a shooting on the campus of Seattle Pacific University.
The Seattle Fire Department is saying that four victims are being transported to Harborview Hospital with wounds ranging from minor to life threatening.
The Seattle Police Department says one man and one woman have life-threatening injuries and two men in stable condition.
The campus remains on lock down. Students and faculty were notified through an emergency text and email system that there was a shooter on campus and that the notifications were "Not a Drill." All evening classes have been canceled. Tomorrow was supposed to be the last day of classes at SPU.
Police were seen putting a young-looking man with short black hair and a black hoodie into a police car. It's not known for sure if he's the suspect in the case.
The suspect vehicle is believed to be a white Chevy pickup, parked near the corner outside of Otto Miller Hall.
Stay tuned to NewsRadio KFBK and KFBK.com for updates on this developing story.
Update: 4 stretchers at Seattle Pacific University staging. At least 4 wounded. 1 shooter caught, 1 at large. Via CBS pic.twitter.com/cfZWePLxEa— Mark Murphy (@MarkMurphy2011) June 5, 2014
Officers still searching for 2nd suspect. White male, long sleeve blue shirt wth vertical stripes armed with handgun. @SeattlePacific— Seattle Police Dept. (@SeattlePD) June 5, 2014
One of the suspects arrested after the shooting at Seattle Pacific University pic.twitter.com/i4FLaQdZDf— Rodrigo (@RodrigoEBR) June 5, 2014