TIMELINE: Marysville-Pilchuck High School shooting

Snohomish County — Officials expect the investigation into the fatal shooting that has killed three and injured others to last several months. In this timeline, you can see how the events unfolded Oct. 24. KIRO 7 will continue to track developments in this timeline.

Quick facts:

  • 14-year-old gunman dead, 2 teen girls dead
  • Two teen boys and one teen girl remain in critical condition
  • Gunman, Jaylen Fryberg, was freshman at school
  • Two students were treated for minor injuries at the school.
  • 2 victims were cousins of gunman
  • Students evacuated from school
  • FBI involved in investigation
  • All victims under 18 years old
  • Authorities believe .40-caliber Beretta handgun used

Friday, Oct. 24
10:39 a.m. Marysville, Wash. Washington, police receive a 911 phone call from an anonymous cell phone at 10:39 a.m.
10:51 p.m. Marysville Police Department responds to MPHS.  
10:54 p.m. Teacher texts KIRO 7's Joanna Small that "shots were fired."  
11:01 p.m. The same teacher says students and staff are waiting in the classroom with doors locked.  
11:06 a.m. Officials confirm Marysville-Pilchuck High School is on lockdown for "emergency situation."  
11:16 a.m. Chopper 7 video shows students being led out of the high school. Officers deemed the situation safe for students to be evacuated. Some walked across the lawn with their hands up. Others were seen running through the school parking lot. 
11:39 a.m. Police ask parents to not approach the high school. The students are taken by bus to Shoultes Gospel Hall to meet parents. 
11:43 a.m. A nurse confirms three patients with gunshot wounds.  
12:03 p.m. Police tell KIRO 7 the shooter, a student, is dead.  
12:13 p.m. Students are moved to a nearby church to meet parents.  
12:24 p.m. Three patients are in critical condition at Providence Regional Hospital in Everett.  
12:58 p.m. #PrayForMP starts to make its round on social media to send support to those affected by the shootings. 
1:29 p.m. Dr. Joanne Roberts holds a news conference at Providence Regional Hospital. Robert says all three victims had primary head wounds. 
1:33 p.m. Identity of shooter confirmed to be Jaylen Fryberg. Friends of Jaylen Fryberg tell KIRO7 that, "He's not the kind of guy who would do this."
1:40 p.m. A 14-year-old victim is at Harborview Medical Center in serious condition with a gunshot wound to his jaw. 
2:56 p.m. Another victim arrives at Harborview  
3 p.m. Student says he saw Jaylen Fryberg shot himself in the neck after struggling with, who was first reported as a lunch lady. This individual was later identified as a teacher. 
3:18 p.m. The second victim at Harborview is identified as Andrew Fryberg, Jaylen Fryberg 's cousin. 
5 p.m. In a briefing, officials say Zoe Galasso, 14, died from the shooting.  
5:02 p.m. Marysville Schools District Superintendent announces school will close all the following week out of respect. 
9 p.m. A vigil is held at Grove Church.  
Saturday, Oct. 25

The community mourns the horrific shooting that sent four students to the hospital.. 
Andrew Fryberg, 15, and Nate Hatch,14, remain at Harborview in critical condition. Hatch suffered a gunshot wound to his jaw. The two are later updated to stable condition Saturday afternoon. 
Two 14-year-old girls -- Gia Soriano and Shaylee Chuckulnaskit -- are in critical condition at Providence Medical Center. 
Sunday, Oct. 26
Dr. Joanne Roberts from Providence announces 14-year-old Gia Soriano died around 9:30 p.m

Friday, Oct. 31
Fourteen-year-old Shaylee Chuckulnaskit's death is announced at Providence Regional Medical Center.

Want to talk about the news of the day? Watch free streaming video on the KIRO 7 mobile app and iPad app, and join us here on Facebook.