Mayor: Planned Parenthood gunman detained in Colorado Springs

Police have detained the suspected gunman accused of opening fire inside a Planned Parenthood facility in Colorado Springs, Colorado, the city's mayor said.

"The perpetrator is in custody. The situation has been resolved. There's no continuing peril to the citizens of Colorado Springs," Mayor John Suthers told reporters Friday. "But there's a huge crime scene that has to be processed. We have to determine exactly how many victims there are. We'll be reporting on that in the near future."

Eleven people have been transported to local hospitals, according to Colorado Springs Police Lt. Catherine Buckley. Five of those transported are police officers from various responding agencies, Buckley said.

[Previous story, posted at 6:50 p.m. ET Friday]

Police say they're evacuating a Planned Parenthood building in Colorado Springs, Colorado, where a gunman has fired at officers.

"There are an unknown amount of casualties at this point," Lt. Catherine Buckley told reporters around 4 p.m. (6 p.m. ET), adding that shots had been fired shortly before she spoke.

Even once gunfire stops, investigators will be at the scene for hours, she said, checking out items the gunman brought with him to make sure they aren't explosives.

"We don't know what they are," she said. "We know that the suspect brought several items with him, and some of those are inside the Planned Parenthood building and some of them are out front of it."

Officers exchanged gunfire with the suspect inside the building but were not in voice contact with him, she said.

At least four officers were injured in the shooting, she said. Local hospital officials said at least nine people were taken to medical facilities in the area. Details about their injuries were not immediately available

The shooting, which was first reported inside the building around 11:30 a.m. (1:30 p.m. ET), also left a nearby shopping center on lockdown as police searched for the gunman.

It's unclear whether there are hostages or whether there's an additional shooter involved, she said, and authorities have not identified the suspect.

FBI teams were among those responding to the scene, agency spokeswoman Deborah Sherman said.

It was not immediately clear whether Planned Parenthood was the target of the shooting.

Police said the original 911 call reporting the gunman came from the building.

One Planned Parenthood official said the motive behind the attack was unknown, but pointed to what she called a "poisonous environment that feeds domestic terrorism" as a possible cause.

"We don't yet know the full circumstances and motives behind this criminal action, and we don't yet know if Planned Parenthood was in fact the target of this attack," Vicki Cowart, president and CEO of Planned Parenthood of the Rocky Mountains, said in a written statement. "We share the concerns of many Americans that extremists are creating a poisonous environment that feeds domestic terrorism in this country. We will never back away from providing care in a safe, supportive environment that millions of people rely on and trust."

Witnesses: Police swarmed area

Denise Speller, who works at a nearby salon, said she heard at least 10 gunshots go off and saw a police officer get hit.

"It was terrifying," she said, adding that it was unclear exactly where the shots were coming from.

Brigitte Wolfe, who said she works in the area of shooting, told CNN that she saw about five officers behind a building with their guns drawn, as well as about three SWAT vehicles and roughly seven police cars from her vantage point in a strip mall that's across the street from the Planned Parenthood. A grocery store and bank are nearby, Wolfe noted.