Police are looking for a man seen leaving a house in Remuera, Auckland, in a "distressed" state and possibly holding a knife.
Officers were called to a property on Seascape Rd, about 8.30am, after a report of concern for a person's mental health state.
"A man at the address appears to have left in a distressed state and there are concerns for his mental health. It's believed he may be in possession of a knife."
Police said just after 10.30am that authorities were still in the area working to find him and have advised nearby schools as a precautionary measure.