ATF and several local law enforcement agencies are serving a search warrant on a local property near the Sandario and Ajo area.
The warrant is part of an ongoing investigation, according to ATF officials, and could be a possible federal firearms violation.
Also on scene are officials with Oro Valley Police, Border Patrol agents, as well as Pima County Sheriff's Deputies and ATF agents.
According to officials on scene, law enforcement is speaking with three people inside the home, but is releasing no further details.
A Pima County Sheriff's Department K9 was also used to sniff around vehicles on the property.
Stay with Tucson News Now on air and online for updates on this situation as they come in.
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7831 N. Business Park Drive