"We are appalled at the violent nature of this crime during broad daylight,'' said Detective Sergeant Simon Beal of Counties Manukau CIB.
Police appealed for any information that might help catch the offender.
They have asked members of the public who saw suspicious behaviour around Huia, Stonex and Kimpton roads and Bernard St, Papatoetoe, between midday and 4pm yesterday to call police.
Anyone with information can call Mr Beal of the Counties Manukau CIB on 09 261 1321. Information can also be provided anonymously to the organisation Crimestoppers on 0800 555 111.