Setti Warren, the former mayor of Newton who also ran for governor in Massachusetts and the U.S. Senate, died unexpectedly at his home Sunday. He was 55 years old. A cause of death has not been released.

Warren was most recently the Director of the Institute of Politics at Harvard's Kennedy School.

"Setti was a beloved member of our community, and we're devastated by this heartbreaking news," the school said in a statement .

Warren, a Democrat, was the Mayor of Newton from 2010 to 2018. He was the first African American to be elected mayor in Massachusetts.

Warren made a brief, unsuccessful run for governor in 2017 . He also ran for the U.S. Senate in 2011 , in a race later won by Elizabeth Warren.

Warren was also an Iraq War veteran and a former Naval Intelligence Specialis

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