Boston Emergency Medical Services confirmed one person was killed and a second person was transported to an area hospital, WCVB-TV reported.
Multiple floors of the Government Center garage came down after a crane collapsed on areas that were under construction, crews on scene told the station.
Suffolk County District Attorney Kevin Hayden told WCVB-TV that the person who died was a young man, but he did not identify him.
Boston police officers, firefighters and emergency service personnel, and state police troopers all responded to assist.
“Companies working at a partial building collapse at 1 Congress St.,” the Boston Fire Department tweeted.
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