The South Dakota Highway Patrol got a call a little after 8 p.m. Wednesday night about a person with a gunshot wound at a residence in the 400 block of 1st Street.
By the time deputies found the person, the person had died.
The incident is being investigated to figure out the facts surrounding the death, but authorities say they don't believe there's a threat to the public.
Detectives from the Rapid City Police Department and investigators from the Pennington County Sheriff’s Office will be handling the investigation.
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One person is dead after a shooting in Keystone.