A 73-year-old man opened fire in southern Arizona, killing five people and wounding one other before fatally shooting himself, authorities said.
Yuma police identified the suspected shooter as Carey Hal Dyess of Yuma.
The timeline of events wasn't immediately clear, but police said they responded to the first call at about 9:30 am local time on Thursday and found Dyess dead two hours later.
One of the victims, an adult male, was killed inside a business in the downtown Yuma area, investigators said.
The shooting forced officials block off a city street and lock down the nearby Yuma County Courthouse and some area schools.
No one was injured at the courthouse or schools, and the buildings were later reopened.
Dyess fatally shot four other people elsewhere in Yuma County, police allege. The wounded person was flown to a Phoenix-area hospital.
Yuma County sheriff's deputies found Dyess dead of an apparent self-inflicted gunshot wound at about 11:30 a.m., police said.
The victims' names were not released.
Court records show Dyess was involved in two civil court cases, one in Yuma and one in nearby Wellton.
A judge issued an order of protection against Dyess in one of the cases in 2006, and a court clerk said it stemmed from Dyess' wife divorcing him.