Updated 8.47pm: Police remain at the Whangamata house where a 79 year old man was killed overnight.

A homicide investigation is underway after detectives were called to the property in Achilles Avenue around 1 o'clock this morning.

Police won't comment on how the man died, or if a weapon was involved.

Waikato Police spokesman Andrew McAlley says they'd like to hear from anyone who was in the area overnight.