JUNEAU, Alaska — Deputy Alaska Labor Commissioner David Stone has died suddenly in Juneau at age 55.

The former Juneau Borough Assembly member and deputy mayor collapsed at home after saying he didn’t feel well after work Tuesday. Juneau Mayor Merrill Sanford said medics tried to revive Stone, and he was taken to a hospital, where he was pronounced dead. Sanford was at the hospital with Stone’s wife and family.

Stone was elected to the Assembly in 2003 and left in October after serving the maximum three consecutive terms allowed.

Stone was promoted to deputy commissioner of the Department of Labor and Workforce Development in October 2011, returning to the position he previously held.

Stone also served as Lt. Gov. Mead Treadwell’s chief of staff, leaving last year to return to the labor department in its assistant commissioner position before being promoted to deputy commissioner.

Stone’s state biography says he was raised in Juneau and earned a bachelor of science degree in geology from the University of Alaska.

Stone also was a historian who gave presentations on the history of mining, and he co-authored the book “Hard Rock Gold,” about Juneau’s mining past.

He also was a former president of the Alaska Miners Association and served as a trustee of the Alaska Miner’s Hall of Fame. According to the state biography, Stone also served as president of AJT Mining Properties and vice president of Alaska Electric Light and Power Co.

Sanford said funeral plans are pending.