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L.A. County Sheriff's Deputies went to the Jackson family home in Calabasas and took a battery report ... after family members reported a disturbance.

Steve Whitmore tells TMZ ... Lost Hills deputies from the Sheriff's Dept. showed up this afternoon at the compound and someone inside accused someone else present of a physical assault.

Deputies took a report but no arrests were made.

Whitmore tell TMZ ... Lost Hills Sheriff's deputies have been on the Jackson case since April, when a business associate of the Jackson family alleged that Katherine Jackson was being emotionally and financially mistreated by family members.