Allegations of a secret backroom deal in the Town of Hempstead have caught the attention of the feds.

According to a town memo obtained by News 12 Long Island, the U.S. Attorney's Office served the town with a subpoena Thursday to provide records on a town contractor's work at Malibu Beach Park and other town properties.

Hempstead Town Supervisor Laura Gillen sent the memo to the town attorney, comptroller, parks commissioner and other town officials asking them to fully comply with the subpoena for documents related to town contractor Butch Yamali, who is the CEO of Malibu operator Dover Gourmet Corporation.

Gillen is accusing Parks Commissioner Daniel Lino and other officials of negotiating a "backroom deal" with the operator of Malibu Beach Park. She says Dover owes the town more than $500,000 in back rent as a result.

Gillen says the contract should be nullified now. Yamali says his business has acted legally and in accordance with its town vendor contract. He is accusing Gillen of playing politics.

In the memo, Gillen wrote in part, "Any attempts to in any way hinder this investigation, such as hiding, covering up, deleting or destroying records related to this investigation will also be immediately reported to the FBI agent in charge of this investigation, with whom my office is cooperating."

The federal subpoena comes one day after Gillen called for the town board to hire an outside independent counsel to investigate business dealings between unelected town officials and Dover Gourmet.

The U.S. Attorney's Office, Gillen and Yamali declined News 12's request for an interview about the subpoena.