On Saturday morning, the Pinal County Sheriff's Office tweeted that it was responding to an aircraft down in the Superstition Mountains area, adding that multiple parties reported witnessing the incident.
The involved aircraft is a small two-seater airplane, and both individuals onboard are deceased, the Sheriff's Office said in an update hours later, noting that they are working to "positively identify them and notify their next of kin."
Officials said that the single-engine plane had reportedly been part of a flight involving two other airplanes.