PIERRE, S.D. (AP) - South Dakota's chief lawyer and law enforcement officer says he doesn't plan to seek felony indictments over daily fantasy sports wagering without a clear directive from the Legislature.

Attorney General Marty Jackley said Monday his decision is in part based on uncertainty over whether the contests constitute illegal gambling under state law.

Jackley says he will continue reviewing other alternatives. An industry representative told regulators last month that the contests are legal in South Dakota.

Daily fantasy has gained popularity after both Boston-based DraftKings and New York-based FanDuel unleashed a flurry of on-air, online and billboard ads promoting the games to casual sports fans.

A DraftKings employee winning $350,000 in a contest on rival FanDuel earlier this year raised insider trading questions.

Copyright 2015 The Associated Press.