LONGMONT, Colo. (AP) — Longmont voters have approved a ban on oil and gas fracking and the storage of fracking waste in city limits.

The city charter amendment bans hydraulic fracturing, or "fracking," a process used by oil and gas drillers to crack rock deep below ground.

Supporters of the ban say the practice is environmentally risky, while opponents, including state officials, say the measure will bring lawsuits over regulation of mineral rights.

According to the Longmont Times-Call (http://tinyurl.com/cpftu6o ), state law allows cities to set standards on how and where drilling operations are conducted, but not a total ban.