CHESTERFIELD, S.C. -- One person was killed in an officer-involved shooting at a Chesterfield, S.C. mental health clinic.

The call came into police around 11:30 a.m. Monday.

The South Carolina Department of Mental Health says a client of the Tri-County Mental Health Center is dead. The victim has not yet been identified.

The department said a probation officer brought the patient to the facility Monday morning. During a psychiatrist appointment, health officials say the patient was heard becoming loud and argumentative, and the officer immediately responded. Staff members say they then heard several gunshots.

The building went on lockdown during the event. Staff members and other patients stayed behind locked doors while it unfolded.

Law enforcement responded shortly after.

The psychiatrist said the patient assaulted him, but was he was not seriously hurt.

A staff member suffered a minor injury.

The Chesterfield Police Department chief said a probation officer shot the victim. The details of the shooting have not been released.

The clinic is closed for the rest of the day but is scheduled to reopen Tuesday. The Tri-County Center provides outpatient mental health treatment to adults and children in Chesterfield, Marlboro and Dillon counties.

SLED is investigating.

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