Update: According to the AP, authorities believe Katherine Jackson is safe in Arizona, though the L.A. County Sheriff's Department is still trying to get in touch with her.

Depending on which member of the Jackson family you believe, Katherine Jackson -- matriarch and mother of Michael, Janet and the rest of the gang -- is either missing or resting comfortably in Arizona.

As TMZ reports, one of Katherine's nephews reported her missing with the L.A. County Sheriff's Department last night (July 21). Her grandchildren have apparently not heard from her in a week, and taking to Twitter earlier this morning, Paris Jackson, the 14-year-old daughter of Michael, voiced her concern for the 82-year-old.

"yes , my grandmother is missing . i haven't spoken with her in a week i want her home now," Paris tweeted, adding in a follow-up post that anyone with information on Katherine's whereabouts should call (818) 876-0186.

Paris' tweets come days after Jermaine used the social network to deflect rumors about Katherine and insist his mother is doing just fine.

"I want to reassure everyone (inc all sudden medical experts) that Mother is fine but is resting up in AZ on the orders of a doctor, not us," Jermaine tweeted.

"Outsiders, from Alan Duke to TMZ "sources", can clutch at straws all day long but no-one can tell us about events concerning our own mother," he wrote in another post.

All this contradictory tweeting comes at a time of tremendous family drama, even by Jackson standards. Last week, Randy, Jermaine, Tito, Rebbie and Janet Jackson issued a letter accusing the executors of Michael's estate of faking documents, and Katherine is said to be at the center of the family squabble.

What's more, Janet has spoken out against niece Paris' burgeoning acting career, insisting her brother wouldn't have wanted her to get involved in show business so young.

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