Phoenix police are searching for a gunman who opened fire at an office building, wounding three people, one of them critically.
Sgt. Tommy Thompson said the remaining two victims' injuries were less severe. He said police do not believe the shooting was a random act. Police believe there was only one shooter.
A SWAT team surrounded a house 7 miles from the shooting scene that police said is connected to the shooting.
The gunfire prompted terrified workers throughout the complex to lock the doors to their offices and hide far from the windows. SWAT officers searched the building.
The shooting took place on the same day that hearings on legislation to address gun violence were convened in Washington, with former Arizona Rep. Gabrielle Giffords testifying for stricter gun controls.