A woman who lives in the complex said she looked out her apartment window at the complex about 1:15 p.m. to see a squad car approach, and a few seconds later heard a gunshot and saw the officer fall. Kelly Hanson, 21, told The Associated Press she saw other officers put the wounded policeman in an armored SWAT vehicle and take him away, but she could not tell if he was alive or dead.

"I thought, what is going on? I know what a gun sounds like, and thought 'This isn't good,'" Hanson said. She said she stayed in her apartment until about 4:45 p.m. when she heard a volley of about 10 shots and began to "freak out." Authorities eventually let her leave her apartment.

"It's tragic that had to happen, but I think they did a good job out here today," Hanson said.

SWAT members entered the apartment building about 2:30 p.m., the Wausau Daily Herald reported. Nearby schools and a hospital went on lockdown. The lockdowns were later lifted.

Susan Thompson, a resident of the building, told the newspaper she heard gunshots and heard someone scream. As she left her apartment, police called to her to get inside and lock her doors. Thompson, 21, said she had her 2-year-old daughter in the apartment. Officers later came to her door and helped her and her daughter outside, she said.

Omar Sey, 31, who said he had just moved to the apartment complex, learned of the shooting after he arrived home to find dozens of squad cars outside. Sey, who said he had moved to Wisconsin from Gambia, said he didn't understand why such things happen in America.

"This is crazy," he said. "You have everything at your disposal. Why don't you make your life better instead of engaging in this?"

AP