NSW Police will address the media this afternoon after officers pepper sprayed an 87-year-old man in a nursing home in south-west Sydney.

In a statement, police said officers from Camden responded to a nearby aged care facility after reports of a concern for welfare of a resident.

"The man had reportedly threatened to harm other residents and himself, while armed with a metal object, swinging it at staff who locked themselves in a room," the statement said.

"Upon arrival, officers located the 87-year-old man in the foyer, still armed with the metal ornament. He refused police direction to put it down and OC spray was deployed."

The man was "restrained", police said, before being taken by NSW Ambulance paramedics to Campbelltown Hospital.

NSW Police said "nil injuries" were reported in

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