NASHVILLE, Tenn. (AP) — Tennessee and federal health experts are investigating an outbreak of meningitis that infected 14 people who received steroid injections, killing two of them, the state’s chief medical officer said Tuesday.

Dr. David Reagan, chief medical officer for the Tennessee Department of Health, said the latest two cases were confirmed in the past 24 hours. All but one of those who contracted the infection had received steroid injections for back pain at a Nashville clinic, authorities said.