Authorities say the remains of a 64-year-old Arizona City woman who went missing six weeks ago have been found on the Tohono O'odham Nation. 

About 11 a.m. Tuesday, officials with the nation's Department of Public Safety located the remains in a remote area of the Ak Chin community, according to a news release. The remains were identified as Bonnie Webb. 

The Casa Grande Dispatch reports that an autopsy will be done to determine the cause of death.

Webb disappeared on the night of March 31 after leaving her daughter's house and driving west toward Maricopa.

Her truck was later found abandoned on April 4 on the Tohono O'odham Nation, the release says.

Webb's family say they were notified Tuesday that authorities had found her remains about 2 miles south from where her truck was found on the reservation.

The investigation is ongoing.

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Information from: Casa Grande Dispatch.

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