Ex-gov failed to protect Flint residents -MI official

"The Flint water crisis is not some relic of the past. At this very moment, the people of Flint continue to suffer from the categorical failure of public officials," Hammoud said.

Flint's troubles began in 2014 after the city switched its water supply to the Flint River from Lake Huron to cut costs. Corrosive river water caused lead to leach from pipes, tainting the drinking water and causing an outbreak of Legionnaires' disease.

Nick Lyon pleaded not guilty to the charges, which were linked to the deaths of nine people, at his arraignment in a Gennessee County court on Thursday, according to media reports.

Former Governor Rick Snyder and Howard Croft, Flint's former public works director, were also arraigned, the reports said.