Police are now working to speak with everyone present at the time of the incident to determine what occurred and identify the person responsible.
Anyone with information was asked to contact police at 105, or online at 105.police.govt.nz, quoting the file number 231203/4869.
Information can also be provided anonymously to Crimestoppers on 0800 555 111.
Finn Williams is a multimedia journalist for the Whanganui Chronicle. He joined the Chronicle in early 2022 and regularly covers stories about business, events and emergencies. He also enjoys writing opinion columns on whatever interests him.