The Detroit News says Thursday that a lawsuit filed by Palace Sports & Entertainment in Oakland County Circuit Court demands the return of confidential records and seeks a cash award.

Palace says at least nine ex-employees have joined Tom Wilson at Ilitch Holdings, which controls the Detroit Tigers and Detroit Red Wings.

Wilson was the head of the Pistons and Palace Sports until he resigned in February. He is not a defendant in the lawsuit.

Palace Sports says it lost information that could be used to attract sponsors and vendors. Olympia Entertainment, an arm of Ilitch Holdings, calls the lawsuit "sour grapes."