Police investigating the Burlington mall shooting that killed five people have arrested a 20-year-old suspect. The man was arrested in Oak Harbor shortly before 7 p.m. Saturday, a Washington State Patrol spokesperson said.

The WSP identified the suspect as Arcan Cetin. Cetin is originally from Adana, Turkey, according to his Facebook page. He is a 2015 graduate of Oak Harbor High School.

Officials described him as a "legal permanent resident" of the United States.

UPDATE, Sunday: Investigators spent Sunday combing through the suspects residence and vehicle, a Washington State Patrol officials said via Twitter. The police were also interviewing witnesses and looking into other tips, a multitude of which led to the suspects identity.

Information about the victims will be released Monday by the Skagit County Coroner's office.

No motive for the shooting has been determined yet.

At a late-evening press conference, law enforcement officials said the suspect apparently had a vehicle at the mall, which they discovered from reviewing security tapes of the mall parking lot. Further tracking of the suspect's car after the shootings was made possible through the city of Burlington's surveillance cameras.

Lt. Mike Hawley of the Island County Sheriff's Office was the arresting officer.

"As we were driving by, I see the fella walking across the street and I go, 'Oh, that's him,'" Hawley said. "So I whipped a real quick U-turn and hit the lights, pulled my gun and he was under arrest."

Hawley described Cetin as being almost like a zombie.

"I said, 'You're under arrest' and he didn't say much ... well, he didn't say anything at all," Hawley said.

He said Cetin was not armed.

"He was carrying a little leather satchel with a computer in it and that's about it," Hawley said.

Officials at the press conference stressed that the original description of the suspect as "Hispanic" was based upon witness accounts.

Cetin is expected to be booked into Skagit County Jail. He has not yet been charged.

KOMO News contributed to this update.

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BURLINGTON, Wash. — The suspect who police say shot and killed five people in the Cascade Mall in this small Western Washington community apparently entered the mall without a gun, obtained a rifle inside the mall and fatally shot five people before fleeing the building.

The weapon was recovered at the scene.

"Apparently, he walked into the mall on his own, first. What he was doing, we don't know at this point. And then later, the video image picks him up in Macy's with the rifle," said Lt. Chris Cammock of the Mount Vernon Police Department at a morning news conference. "We recovered the weapon at the scene."

The killings took place in the cosmetics department of a Macy's department store, an anchor tenant at the popular mall.

Cammock would not speculate about how the suspect obtained the weapon, whether it had been stashed at the mall before the shootings. Cammock described it as a "hunting type" rifle but provided no further details on the weapon.

The suspect was reportedly seen heading for Interstate 5, which runs past the mall roughly 100 yards away. A short, chain link fence is the only barrier between the mall parking lot and the freeway. Images of the suspect taken from surveillance video and released by officials can be seen above.

Police said they were looking for a man dressed in black. His description, including that he appeared to be Hispanic, was based on statements from witnesses, said Given Kutz, a spokesman for the Skagit County Emergency Operations Center.

"We do not have an identity on the individual yet," Cammock said. "We could certainly use the community's help."

The FBI was assisting local authorities, but Michael Knutson, assistant special agent in charge of the Seattle FBI, said there was no evidence to point to terrorism.

Four victims, all female and ranging in age from teen to senior citizen, died in Macy's. The fifth victim, a male, died overnight after being transported to Harborview Medical Center in Seattle, reported the Skagit County Department of Emergency Management in a news release. The release stated:

At approximately 6:58 p.m. Sept. 23, Skagit 911 received a call from the Macy's Department Store at Cascade Mall reporting an active shooter. The suspect was described as wearing black clothing and carrying a rifle. Only one shooter was reported. Local and regional law enforcement from more than 26 agencies immediately responded to the mall to secure the scene and evacuate workers and visitors. At the height of the incident, approximately 200 law enforcement officers were on scene. According to surveillance video taken from the mall, the shooter appeared to enter the mall without a weapon; ten minutes later, he reappears on surveillance video at Macy's with a rifle in his hand.

"There are people waking up this morning and their world has changed forever," Burlington Mayor Steve Sexton said Saturday at a news conference. "The city of Burlington has probably changed forever."

People fled, customers hid in dressing rooms and employees locked the doors of nearby stores after gunshots rang out just after 7 p.m. Friday at the mall, located about 60 miles north of Seattle.

Stephanie Bose, an assistant general manager at Johnny Carino's Italian restaurant near the Macy's store at the mall, said she immediately locked the doors after hearing about the shooting from an employee's boyfriend.

"He was trying to go to the mall and people were screaming," she told The Associated Press. "It was frantic."

She said he could see police at the doors with assault rifles.

It took hours for teams to search the 434,000-square-foot mall late Friday night. They escorted shoppers and workers who had sheltered in place outside.

"It took several hundred to do that ... clearing every room, to make sure the suspect wasn't still on the scene," Cammock said.

Joanne Burkholder, 19, was watching the movie "The Magnificent Seven" in a theater at the mall when police and security came in and said they needed to evacuate.

She said she heard screaming as they were escorted out into the parking lot.

"I've never been so terrified in my life," she said.

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The parking lot was closed and emergency management officials told people they would be able to retrieve vehicles Saturday, though the mall said it would be closed for the day.

Worried residents feared for their safety Saturday.

Maria Elena Vasquez of Burlington attended a community gathering Saturday following the slayings. She said "it's nerve-wracking" and she's nervous about taking her 7-year-old daughter to her soccer game.

"I'm nervous. I don't know if we'll be going back there. It's too scary," she said referring to the mall. "It's too close to home."

Burlington is a city of about 8,000 people, but its population swells to several times that as people visit the mall and area outlet stores during the week.

Names of the victims have not been released. The mall remains closed.

Seattlepi.com staff contributed to this report.