Investigators say the latest incident was Monday, when rocks, dirt and sand were put in the temple's mailbox. Twenty solar-powered lights were also taken.
Members say the mailbox has been vandalized five times in the past month, and there have also been five attempted break-ins.
Vandalism at the temple a year ago included smashed lights, yanked flowers and a cross along with "Jesus saves" spray-painted on the driveway in orange.
Olmsted County Sheriff's Sgt. Scott Behrns says the crimes are obviously motivated by bias.