Texas is the latest state to consider daily fantasy sports sites such as DraftKings and FanDuel an illegal form of gambling.

Attorney General Ken Paxton wrote Tuesday in a nonbinding legal opinion that the popular online games run afoul of existing Texas law. The ruling is another blow to daily fantasy sports operators, though it doesn't force the multi-billion dollar industry to leave Texas.

DraftKings and FanDuel have filed lawsuits in other states where attorneys generals have ruled against their games.

New York filed a lawsuit in November to stop the websites from operating, but an appeals court has let the games continue there for now. State legislatures are also grappling with the legality and possible regulation of fantasy sports as lawmakers returned to work this month.