Officers responded to a report of shots fired around 10:30 p.m. on Saturday near Rock Quarry Road and Martin Luther King Jr. Boulevard.
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When police arrived, they said they found a man with a gun.
RPD said one of the officers shot that man who was then taken into custody and also treated for his injuries.
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As officers kept investigating, they said they found three other people who were injured in the incident and rendered first aid.
It's unclear whether they were involved in the shooting, or how they were injured. Police didn't say whether they were shot or if so, by whom.
The three were taken to a hospital.
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Officers did have their body cameras turned on during last night's shooting and those videos are being reviewed by the State Bureau of Investigation and RPD internal affairs.
"In keeping with departmental policy, the State Bureau of Investigation was notified and promptly responded to conduct a criminal investigation and will submit its findings directly to the Wake County District Attorney," said Zachary Lechette, RPD deputy chief. "The RPD's internal affairs unit will conduct a separate but parallel administrative investigation to focus on departmental policy compliance."
More details about the shooting will be released in the next five days when RPD is required to release a report.
Rock Quarry Road was closed for several hours last night and Sunday morning but has since re-opened.
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