Newton family member and spokeswoman Tricia McCrone declined to comment to The Associated Press.
The Newtons told the Review-Journal they’ve bolstered security at their 20-acre home and believe that home surveillance video will help police identify the suspects.
The Newtons moved to the house in 2013 following the bankruptcy sale of their nearby 40-acre estate, Casa de Shenandoah.
The gilded property is now a tourist attraction and museum. It featured gardens, pools, stables for Newton’ Arabian horses and a menagerie of exotic animals from flamingos to penguins. It and closed last month for renovations.
Newton’s best-known songs include his signature “Danke Schoen,” his 1965 version of “Red Roses for a Blue Lady,” and “Daddy Don’t You Walk So Fast,” which peaked at No. 4 on the Billboard charts in 1972.