AUGUSTA, Maine (AP) — Maine Attorney General Janet Mills says a new type of electronic bingo machine the Penobscot Indian Nation wants to use is illegal.

In an opinion issued last month, Mills says the machines violate state law because they determine the outcome of the game.

But Penobscot Tribal Rep. Wayne Mitchell says he believes Mills’ opinion relies on federal law, rather than Maine statutes.

For two years the Penobscot have tried to develop new electronic games that would be added to the tribe’s high-stakes bingo parlor on Indian Island. The system being developed works much like a slot machine, but Mills’ says the machine determines the winner.

The Bangor Daily News says the tribe has a number of machines that are unused because the state hasn’t issued a license.