Otago University students are advised to keep an eye on the university's website for updates on the mass shooting threats investigation.

Students today received a text message from the university advising them that the threat had not been substantiated but police were taking it seriously.

The updates are being posted to www.otago.ac.nz/news/news/otago197001.

Dunedin Police and specialist staff members from Otago University are investigating a mass shooting threat that was posted to an online forum yesterday.

The post, which stated "the necessary preparations have been made for you to expect a shooting of a similar calibre to that of Seung-Hui Cho", has sparked extra attention with the High Tech Crime Group in Wellington also taking part in the investigation.

Police say they want to reassure university staff and students, and the wider Dunedin community, that appropriate measures are being taken in relation to the post.

Inspector Mel Aitken, acting Area Commander of Otago Coast, says police take any threat seriously while its source and authenticity is being assessed.

We will deal firmly with any individuals associated with any such copy cat threats - Inspector Mel Aitken

The post to the forum starts with: "If you're in Dunedin, I wouldn't recommend coming to Otago University on Wednesday... notes have been taken from tactics used in other massacres and shootings.

Insp Aitken advises the public to be alert and vigilant but not alarmed while police investigations continue.

"We are also asking those in the university area to report any suspicious behaviour immediately to police," Insp Aitken says.

"We understand that a threat of this nature could be concerning to some people."

Police, University of Otago and Campus Watch staff will be available to speak with anyone who has concerns.