William Lowe, 59, who lives across the street, said he heard six shots fired shortly after his alarm went off at 7 a.m. He looked through the peephole of his door to see people scattering from the home.

Some of the guests had their faces painted and hair dyed for a "zombie party" held Friday night, Police Chief Gil Kerlikowske said.

One man staggered out and sat down, Lowe said, and a large man dressed in black - about 6-foot-1 and maybe 225 pounds - came out carrying a shotgun across his chest. When an officer standing in the street told him to put the weapon down, he put the barrel in his mouth and fired.

Officers found three dead in the living room, one at the front door and another on the porch steps. Three people were taken to Harborview Medical Center; one died, one was in extremely critical condition and the third was stable, the nursing supervisor said. Officers transported about a dozen witnesses to a precinct to interview them.

The victims were in their late teens and early 20s, police said. Officers said they were not yet aware of a possible motive.

"It's one of the largest crime scenes the city has ever had," Kerlikowske said.

As darkness fell, young people gathered near the house - police tape kept them from getting too close - and lit candles for the dead.

Among them was Amy Williams, 17, of north suburban Lynnwood, who said she had been at the rave but not the after-party. Most of those at the rave - which featured about 20 DJs and black lights at a local art center - made themselves up as zombies or "the undead" to get a $5 break on the $20 cover price, she said.

She said she washed her face after about 10 minutes inside because it was so warm.

Williams said she'd been told that two friends had been killed at the house. "I know them by their rave names, Deacon and Sushi. They're both total sweethearts, they loved to party, loved the rave scene," she said.

The massacre "pretty much ruins what raves are all about," she said, defining that as "PLUR - peace, love, unity and respect."

Dozens of rounds were fired in the house, where people - ranging from their early and mid teens to mid-20s - gathered after a larger party called "Better Off Undead" in the Capitol Hill neighborhood. Some of the guests were "made up to look as if they were dead," the chief said.

He said the shooter, who had been invited to the party at the home, left the house about 7 a.m. and came back 10 minutes later heavily armed.

As the gunman walked the half block from his black Dodge pickup truck, he apparently spraypainted the word "NOW" in orange twice on the sidewalk and once on the steps of a neighbor's home, police said.

When he got to the house, he immediately opened fire before forcing his way inside. He shot two people outside, three in the living room and then went upstairs looking for more victims, Kerlikowske said.

Just before the shooting started, a 20-year-old Bellevue man told The Seattle Times, his 17-year-old girlfriend called him to an upstairs bathroom to talk while she applied makeup. Most everyone else in the house had been asleep about five hours, said the man, who was not identified.

"We heard gunshots and screaming and I opened the bathroom door and looked down the stairs and saw flashes from the gunshots. It was pretty intense," he said.

He locked the door and he and his girlfriend crouched in the bathtub.

"After all the gunshots, the shooter came upstairs and tried to open the door. He shot a round through the door and the bullet whizzed by my face," the man said.

The gunman then went back downstairs, he said.

"We thought we were going to die, plain and simple," said the young man, interviewed outside the downtown police station where he said he was among a group of about 30 partygoers questioned by police.

Kerlikowske said an officer in the neighborhood heard the shots and arrived to find one person staggering out of the house with a gunshot wound. The officer confronted the man with a shotgun but got no further than "Drop your ..." before the man turned the weapon on himself, the chief said.

The gunman also had a handgun, police said. Kerlikowske said the gunman mainly used the 12-gauge pistol-grip shotgun, "a weapon not designed for hunting purposes but for hunting people."

The gunman was wearing bandoliers of shells for the shotgun and carrying additional clips for the handgun. In his truck, police found an assault rife and multiple "banana clips" carrying 30 bullets each.

Police said they did not know if drugs or alcohol were a factor, though Kerlikowske said marijuana and alcohol were found in the house.

"This is a terrible tragedy for all of the victims and theirfamilies," said Mayor Greg Nickels in a statement.

"This kind of gun violence is extremely unusual for Seattle and this neighborhood," he added. "We don't know the exact reason, but we do know that it wasn't random.:"

Neighbor Cesar Clemente, 25, said he called 911 when he heard the shots. He looked outside to see people fleeing, and two people huddling in the bushes. He called for them. One, a man, made it to his front entryway, shot in the arm and the abdomen. The other collapsed in the bushes.

Clemente asked the man what happened. He said only, "I've been peppered." Medics quickly took him away, leaving behind a few shotgun pellets on the floor where he had been lying.

Lowe said people came and left the house at all hours, often with facial piercings and elaborate makeup.

"This was a destination point," he said.

Nancie Thorne arrived at the scene after getting a chilling call from her daughter's boyfriend. He said he and Thorne's daughter, Suzanne, were at the house where the six murders occurred. He told Nancie he was outside and Suzanne was inside

"When this guy ran into the house and opened fire. Jesse said there was a lot of gun fire and my daughter Suzanne was in the house at the time and she was stuck in the house and couldn't get out," said Thorne.

Thorne came with her daughter's temporary driver's license, hoping the picture would help police determine if her Suzanne was one of the victims. But they could tell her nothing.

"We've got to make sure we have verified victim's ID's by every means possible before we go and notify a family with the worst news they probably will ever receive," said Police Officer Deanna Nolette.

Hospital officials said the girl was not there.

Aaron Hoyle, 25, of Renton, said about five people in or near their 20s lived in the blue, two-story bungalow with white trim, and that some were promoters of warehouse parties. Hoyle hadn't been to the home in about three months, but came to see if his friends were OK when he heard about the shooting on the news.

The home, which according to King County property records is owned by a man named D. Gregg Doyle, is just a few blocks from Miller Community Center, where Little League baseball games were under way Saturday morning.