LANSING, Mich. (AP) — Michigan officials say they still aren’t certain whether there’s a link between a drinking water crisis in Flint and an increase in local cases of Legionnaires’ Disease.

A report Thursday by the Michigan Department of Health and Human Services says nine people died of the bacterial illness between June 2014 and October 2015 in Genesee County, which includes Flint. That’s down from the 10 fatal cases reported earlier this month. Officials say the number was changed after they found some deaths weren’t considered to have been caused by Legionnaires.

Eighty-seven Legionnaires’ disease cases were confirmed between June 2014 and November 2015. About one-third of the infected people’s homes received Flint water, which was found to have elevated lead levels after the city began drawing from the Flint River.