Police are hoping holiday pictures taken by visitors to Waihi for New Year celebrations could help identify an attacker who stabbed a man.
The incident occurred on Tuesday, when a 64-year-old man who was on holiday from Australia, confronted someone who was outside his caravan.
He was stabbed in the head and neck and is in Waikato hospital in a critical condition.
The population at Waihi Beach swells from 3000 to about 16,000 between Christmas - New Year.
Police have been going door-to-door in Waihi, speaking to people about the attack.
The stabbing took place at about 1am outside the victim's caravan on the corner of Beach and Ocean View Roads.
Inspector Dana McDonald said people may have taken pictures in the area at the time of the stabbing that hold clues about the attacker.
He said people should email their pictures to the police in Thames to help with their investigation.
Police set up checkpoints from Waihi to speak to visitors before they left, but they caused too much congestion and were taken down.