A law enforcement official says the suspect in the attack at a Planned Parenthood clinic made a comment about "no more baby parts" after his arrest.
The official could not elaborate about the comment. Planned Parenthood said in a statement Saturday that witnesses said Robert Lewis Dear was motivated by his opposition to abortion.
Police say Dear, 57, killed three people during the shooting rampage and hours-long standoff at the clinic in Colorado Springs on Friday. Dear is in custody and is expected to make his first court appearance on Monday.
Dear is described by those who know him as a loner from North Carolina who liked to spend time in his mountain cabin and avoided eye contact with neighbors. They said he seemed to have few religious or political leanings.
"If you talked to him, nothing with him was very cognitive — topics all over place," said James Russell, who lives a few hundred feet from Dear in Black Mountain. A cross made of twigs hung Saturday on the wall of Dear's pale yellow shack.
Dear also has an address in the town of Hartsel, 60 miles west of Colorado Springs.
The five-hour siege Friday included several gun battles with police as patients and staff members took cover under furniture and inside locked rooms.
By the time the shooter surrendered, three people were dead — including a police officer — and nine others were wounded.
Planned Parenthood said all its staff members at the clinic were safe and that it did not know whether the organization was the target of the attack.
However, the regional head for the group promised to reopen the clinic's doors quickly at a vigil Saturday. A reverend at the same vigil called Dear a "domestic terrorist."
University of Colorado police officer Garrett Swasey, 44, a six-year veteran of the force, was killed during the siege. He was married and had a son and daughter, according to the website of his church, Hope Chapel in Colorado Springs.
No details were immediately available about the two civilians who died. Five other officers and four people were hospitalized in good condition. At least four of those victims were later released.
"Certainly it could have been much, much worse if it were not for the heroism of our police officers to corner the person in the building," Colorado Springs Fire Chief Chris Riley said.
Suthers praised the security staff on duty at the clinic and said they were helpful in working with police to monitor the gunman's whereabouts on surveillance video and advising on the building's layout.
Police take a man Robert Lewis Dear into custody near a Planned Parenthood clinic Friday, Nov. 27, 2015, Colorado Springs, Colo. (Andy Cross/The Denver Post via AP)
Witnesses described a chaotic scene when the shooting first started just before noon.
Ozy Licano said he was in the parking lot of the two-story building and trying to escape in his car when the gunman looked at him.
"He came out, and we looked each other in the eye, and he started aiming, and then he started shooting," Licano said. "I saw two holes go right through my windshield as I was trying to quickly back up and he just kept shooting and I started bleeding."
Licano drove away and took refuge at a nearby grocery store.
"He was aiming for my head," Licano said of the gunman. "It's just weird to stare in the face of someone like that. And he didn't win."
University of Colorado-Colorado Springs Police Department police officer Garrett Swasey was killed in a shooting at a Planned Parenthood clinic in Colorado Springs, Colo., Friday, Nov. 27, 2015. (University of Colorado at Colorado Springs via AP)
Inside the clinic, Jennifer Motolinia ducked under a table and called her brother, Joan, to leave him final instructions for the care of her three children in case the gunman found her.
Joan Motolinia said he could hear gunshots in the background as his sister spoke. "She was telling me to take care of her babies because she could get killed," he said.
For others, the first sign that something was wrong came when police appeared and ushered people to the second floor. Planned Parenthood employee Cynthia Garcia told her mother, Tina Garcia, that the officers wouldn't say why they were gathering everybody together. Then she heard the gunshots.
Her daughter and the others were holed up for hours while the standoff raged, Tina Garcia said.
Some people managed to escape the building and flee to a nearby bank. An armored vehicle was seen taking evacuees away from the clinic to ambulances waiting nearby.
For hours, police had no communication with the shooter other than hearing his intermittent gunfire from inside the Colorado Springs clinic. Officers eventually moved in, shouted at the gunman and persuaded him to surrender, police said.
About five hours after the attack started, authorities led away a man wearing a white T-shirt.
With the immediate threat over, authorities swept the building and turned their attention to inspecting unspecified items the gunman left outside the building or carried inside in bags. They were concerned that he had planted improvised explosive devices meant to cause even more destruction.
Police Lt. Catherine Buckley said Saturday the items were no longer a threat. She declined to elaborate.
Dear's cabin is a half-mile up a curvy dirt road about 15 miles west of Asheville, North Carolina. He also had a trailer in the nearby town of Swannanoa.
Other neighbors knew Dear but didn't want to give their names because they said they were fearful he might retaliate.
Russell and others said the only companion they saw with Dear was a mangy dog, who looked to be in such bad shape they called animal control because they worried he was beating it.
In Hartsel, Colorado, where Dear's other known address is located, residents would occasionally see him at the post office to get his mail but he never said much.
"Nobody really knows him, he stays to himself," said Jamie Heffelman, owner of the Highline Cafe in Hartsel.
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Associated Press writers Kristen Wyatt in Colorado Springs, Alina Hartounian in Phoenix, Michael Biesecker in Black Mountain, North Carolina, and Colleen Slevin, Dan Elliott and Thomas Peipert in Denver contributed to this report.