About eight police officers eventually moved in and shut down the party, the reporter said.
It comes after reports that University of Canterbury-owned Ilam Fields has become home to uncontrolled gatherings while Covid-19 has restricted the usual Orientation Week events.
Two weeks ago hundreds of students gathered at the fields for a toga party with reports of another large party last weekend.
Mattresses were thrown around, people urinated in bushes, and the field was reportedly left strewn with rubbish and broken glass.
And in Dunedin, two students were seriously injured as St Patrick's Day shenanigans spiralled out of control in the student quarter.
The Otago Daily Times reported at about 2pm a 19-year-old man fell from a second storey roof at a Castle St flat.
In another incident, about 4.30pm, a 22-year-old man was taken to hospital with serious head injuries by emergency services staff using a Stokes basket after a house party in Park St went awry.
Senior Sergeant Anthony Bond, of Dunedin, said the man had fallen off an internal balcony and was unconscious for a time.
St John was also called to Brackens View, next to the Northern Cemetery, about 2pm, where about 200 students were gathered. It treated one person in a moderate condition.