Waikato police are investigating an incident in which a bolt was fired through a glass ranch slider at an elderly woman's Whangamata home early today.
Senior Sergeant Rupert Friend of Whangamata police said the woman was woken at her Weka St home by a loud bang about 1am.
"At first she thought it might have been a rock thrown through her window," he said.
Neighbours immediately came to make sure the woman was alright, he said.
It wasn't until sunrise that the woman saw the half-inch bolt lying on her lounge room floor and she contacted police.