“This act of vandalism is completely unacceptable,” said Glenis Philip-Barbara, the ministry’s deputy chief executive.
“This site is not only a memorial but a gravesite, which makes this even harder to fathom.”
She said the ministry was taking this extremely seriously and has notified police. The memorial, at Pt Halswell on the Miramar Peninsula, will be closed to the public until it is repaired.
Massey served as New Zealand’s 19th prime minister between 1912 and 1925. He died while in office and the memorial for him was funded in part by community donations.
“We have informed Massey’s descendants about the damage to the memorial and will keep them updated,” said Philip-Barbara.
“In the meantime, if members of the public know anything about this vandalism, please reach out to the Police.”
A police spokesperson told the Herald they have no evidence to identify the person responsible but anyone with information should contact them on 105 then quote file number 230323/8402.