Police officers work at the crime scene outside of Cascade Mall in Burlington, Wash., where several people were fatally shot Friday. Authorities in Washington State say five people were killed, while the suspect remains on the loose.

BURLINGTON, Wash. — Police searched Saturday for a gunman authorities said opened fire in the makeup department of a Macy's store at a mall north of Seattle, killing four females and one man, before fleeing toward an interstate on foot.

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 Cascade Mall. A helicopter, search teams and K-9 units scoured the area for a rifle-carrying man.

“We are still actively looking for the shooter,” Washington State Patrol spokesman Sgt. Mark Francis said at a news conference. “Stay indoors, stay secure.”

Francis said police were seeking a Hispanic man wearing black and armed with a “hunting-type” rifle last seen walking toward Interstate 5.

Authorities say the motive was unknown for the shooting about 60 miles (97 kilometers) north of Seattle.

The FBI was assisting local authorities as dozens of police officers searched for the suspect. The FBI's Seattle office said on Twitter that it “has no information to suggest additional attacks planned” in Washington state but did not elaborate.

A male victim died early Saturday at a Seattle hospital; authorities had previously announced the deaths of four females. No other details about the victims were provided, including their ages.

Tari Caswell told the Skagit Valley Herald she was in the Macy's women's dressing room when she heard “what sounded like four balloons popping.”

“Then I heard seven or eight more, and I just stayed quiet in the dressing room because it just didn't feel right. And it got very quiet. And then I heard a lady yelling for help, and a man came and got me and another lady, and we ran out of the store,” Caswell told the newspaper.

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 to the restaurant 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 and said they were no longer guarding the doors as of 9:30 p.m.

Francis said at about 8:30 p.m. that the mall had been evacuated and emergency medical personnel were cleared to enter. Francis said authorities were still doing a “final clear” of the 434,000-square-foot (40,319-square-meter) mall late Friday night. He said 11 search teams and two K9 units were involved.

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.