Hartford (AP) — A provision making promoters liable for fighters' health care costs is threatening to derail plans to expand mixed martial arts events in Connecticut.

After lawmakers voted Wednesday to lift a ban on the sport outside Indian-run casinos, they approved the health care measure which some promoters say makes organizing a fight in the state unappealing.

Democratic Senate President Donald Williams Jr. says there's a high likelihood that fighters will be injured and promoters need to take responsibility if they're going to make millions of dollars from MMA events.

MMA is a form of fighting that features boxing, wrestling, taekwondo, judo and other disciplines.

The bill must still be signed by Democratic Gov. Dannel P. Malloy, who hasn't taken a position on it.