Nine tribes in California today asserted their opposition to proposed intrastate Internet poker.

The tribes sent a letter to members of the Senate Governmental Organization committee a day before its informational hearing on the proposed poker initiative from card club interests and tribes that include the Morongo Band of Mission Indians near Cabazon.

“We are writing to clearly state our strong opposition,’’ the tribes wrote.

Proponents of online poker say the endeavor would financially benefit the state. Opposition tribes called it an “ill-conceived” proposal with fundamental flaws, among them the potential risk to exclusivity provisions for tribes that negotiated new or revised Indian gaming compacts with the state of California.

Signing the letter were tribal chairs of the Pechanga Band of Luiseño Indians near Temecula; Jackson Rancheria of MiWuk Indians; Lytton Band of Pomo Indians; Pala Band of Mission Indians; Pauma Band of Luiseño Indians; Picayune Rancheria of the Chukchansi Indians; United Auburn Indian Community; and the Viejas Band of Kumeyaay Indians.