Members of legendary U.S. radio personality Casey Kasem's family are locked in a bitter feud with each other as the Dj battles Parkinson's disease, according to a U.S. report.

Kasem's wife Jean has reportedly blocking his three children from visiting their ailing father, according to, and Kerri, Julie and Mike Kasem have not been able to contact the Scooby-Doo star for three months.

On Tuesday (01Oct13), Kasem's three children, along with friends and co-workers, protested the alleged lock-out during a camp-out in front of his house.

Kasem's brother has also joined the protest and tells that Jean has had a strained relationship with her stepkids for years - and that he hasn't spoken to Jean since his brother married her three decades ago.