Daily London
The department is working with the FBI and US Customs and Border Protection, the statement on Facebook said.
The Associated Press reported that one man was in a critical condition.
Arivaca is an hour south of Tucson, near the US-Mexico border.
The Santa Rita Fire District said it responded to the shooting and the person who was wounded was in custody.
“Patient care was transferred to a local medical helicopter for rapid transport to a regional trauma centre,” the fire district said, Associated Press reported.

