VALLEJO (CBS13) – A man was shot and killed by an off-duty Richmond police officer in Vallejo over the weekend, authorities say.

The shooting happened on Fairgrounds Drive, just before 5:30 p.m.

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Vallejo police say the off-duty officer stayed at the scene, but it’s unclear why the officer opened fire in the first place. The person shot was pronounced dead at the scene, police say.

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No information about the person shot and killed has been released at this point.

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Both Vallejo police and the Solano County District Attorney’s Office are investigating the incident.