WELLINGTON, March 6 (Xinhua) -- New Zealand's Ministry of Health confirmed the fourth positive test for COVID-19 on Friday.

The New Zealand citizen in his 30s, who is the partner of the second case announced earlier this week, was tested positive. The Auckland couple recently arrived home from northern Italy, according to a ministry statement.

Contact tracing is underway for this individual and close contacts are already in quarantine, it said, adding that this man is already in self-isolation at home since Wednesday. He has appropriate clinical support from public health and district health board staff.

"Self-isolation at home is an appropriate response for people with mild to moderate symptoms and is recognized by the World Health Organization. He doesn't require hospital-level care and neither does anyone else in the family home," Director General of Health Dr. Ashley Bloomfield told media.

This confirmed case also attended the Tool concert at Spark Arena in Auckland last Friday when he may have been infectious, Bloomfield said.

"He was in the general admission standing area in the front left-hand quadrant. We encourage people who were in the general admission standing area to be aware of symptoms of COVID-19," he said, encouraging symptomatic people to call.

"Our advice is the risk is low for all others who attended this concert," he added.