Portland Police responded to a shooting Friday afternoon near Rosemary Anderson High School in North Portland. At least three people were taken to Legacy Emanuel Health Center.

Police are searching for suspects in the shooting.

The school is at 717 N. Killingsworth Court.

5:06 p.m.: Gov. John Kitzhaber tweets: I am saddened by the shooting today in Portland. My heart goes out to those involved, their families, and their communities.

3:52 p.m.: Sgt. Pete Simpson said at a 3:30 p.m. briefing that a dispute preceded Friday's shooting, but that it is not known whether it specifically involved the shooter and the victims. Simpson said that the shooters may have gang affiliations, but it's unknown whether that had anything to do with the dispute or the shooting, and it doesn't follow that the victims had anything to do with gangs. "They are victims," Simpson said.

Police say they believe there was one shooter accompanied by two others. The suspects fled on foot, Simpson said, heading north on Borthwick and east on Killingsworth. They left the scene quickly and it's unknown whether they had a car nearby. All are at large.

1:32: p.m.: Portland Police Sgt. Pete Simpson said "Obviously we're thankful we don't have any loss of life." The three shooting victims ran into school conscious, breathing. Also, Portland Fire Lt. Rich Tyler said firefighters from the nearby Station 24 were able to provide medical care to the victims inside the school.

At North Kerby and Killingsworth Court, parents are being reunited with their students.

1:18 p.m.: Gresham police said they received a call after the North Portland school shooting of a threat of a shooting at Rosemary Anderson High School East in Gresham, but so far, have not found the threat credible. An investigation is still ongoing.

Portland Police Chief Mike Reese and Mayor Charlie Hales stand on peace mural on North Killingsworth Court and North Borthwick as police investigate shooting outside Rosemary Anderson High School.

1:15 p.m.: In July, Maxine Bernstein wrote about a street mural students were painting to promote nonviolence. It is at the corner of Borthwick and Killingsworth Court, the scene of the shooting.

Here is some background on Rosemary Anderson High School, a community-based alternative school, has two campuses that serve at-risk students who've been unsuccessful in traditional high schools. The campus on North Killingsworth Court enrolls up to 190 students each year and has been in operation for nearly 31 years.

The school serves multiple districts, and typically students attending it have had disciplinary and educational problems at more than one traditional high school, Portland Public Schools spokesperson Jon Isaacs said. The school is not seen overseen by Portland Public Schools.

Anita Irakoze,17, right, was outside buying snacks. She said, "I heard the gunshots and started running for my life." She said she heard four shots. On the left, Quennie Hillman said her cousin was one of the boys who were shot. She was inside school and heard four shots.

In 2009, Anna Griffin, then a columnist for The Oregonian, wrote about Rosemary Anderson High School and the challenges its students face.

1:11 p.m.: Lockdown lifted at Jefferson High School and Portland Community College. Portland police says the shooting victims are teenagers, working to confirm that they are students.

At this time, police don't know how the shooter left the scene. Officers have cleared the school and the area is now safe and secure.

Here's what is being said on Twitter:

1:05 p.m.: The FBI has put agents at the scene of the shooting as part of its regular task force work, as needed by Portland police, spokeswoman Beth Anne Steele said. The federal agency referred all news information to the police bureau.

1:03 p.m.: Portland police Sgt. Pete Simpson says investigators believe the shooter is affiliated with a Portland gang.

12:58 p.m.: Portland police Sgt. Pete Simpson confirmed that the shooting was outside the school at North Borthwick Avenue and Killingsworth Court. He also said:

The victims were two males and one female. They all ran inside the school outside Rosemary Anderson High School immediately after the shooting.

There is currently not an active shooter at the scene.

Police swept through the school to make sure there were no additional victims.

The shooter left the scene.

12:52 p.m.: Tamara King, who lives near the school with her husband and 4-year-old child, was standing on the corner of North Killingsworth Court when she heard five shots in rapid progression. After hearing the shots, she saw at least four children scatter, diving under a car on North Albina Avenue to avoid gunfire. She called 911 at 12:13 p.m., she said. A short time later she saw two kids being loaded into the back of an ambulance.

12:51 p.m.:

I'm on scene of the shooting in North Portland. Neighbor Tamara King heard 5 shots in rapid succession. Called 912 pic.twitter.com/LR5V1evWxP — Andrew Theen 🚎🚘🚲🚃🚦 🏀 (@andrewtheen) December 12, 2014

Police found bullet casings outside the school ..near N Killingsworth Court and Forthwick/possibly 3 suspects pic.twitter.com/fyKHo1zdbg — Maxine Bernstein (@maxoregonian) December 12, 2014

12:44 p.m.: Portland police say parents of Rosemary Anderson High School students should respond to North Killingsworth Court and Kerby Avenue.

12:36 p.m.: Rosemary Anderson High School serves at-risk students who have been expelled or dropped out of public high school. Rosemary Anderson is an alternative high school with a student body of approximately 130 students, most of whom have struggled to succeed at other Portland high schools. The school is renown for its commitment to attend to these students until they reach the age of 25. "We pretty much force the kids to go to college," said Joe McFerrin, the school's president.

12:30 p.m.: Both Portland Community College's Cascade campus and Jefferson High School are on lockdown.

-- The Oregonian