Though the police have still not been able to identify the man, Detective Senior Sergeant Karen Bright, in a statement, confirmed the victim was an Indian.
Details of the incident were not given out by the police but a report in stuff.co.nz had said that the man was 25-years-old and was "beaten with a baseball bat in south Auckland".
A police spokesperson had told 1 NEWS that the man had been attacked by someone wielding a baseball bat, and investigations were ongoing.
"Police are further seeking the public's help to still identify an Indian male who was seriously assaulted in Takanini on Tuesday night," Bright said today.
"It is critically important to identify this male, so his family and friends can offer him support while he remains in a serious condition," he said.
Police also asked the public to check on their friends, employees and work colleagues if they have not heard from or seen them since Tuesday evening.
Police are also seeking to talk to anyone who may have witnessed the assault or has any information about who the man was.