Police have opened an investigation into a late-night robbery at a multimillion-dollar mansion in Auckland's Mission Bay.

A police spokesperson said they were called to the property about 11pm on Thursday.

Three men had entered the home and took a “number of items”.

“No injuries have been reported,” the police spokesperson said.

“We are ensuring the victims are being provided with support.”

An investigation was ongoing and a scene examination was being carried out today.

The Mission Bay property has a rateable value of $13.2m according to oneroof.co.nz

Police are asking anyone with information to call 105 and reference number 241122/5301.

Information can also be provided anonymously via Crime Stoppers on 0800 555 111.