"We are now aware that on the night of the assault a number of Facebook posts were made which identified one of the people responsible for the assault," Hunter said.
"Some of these posts were made by members of the Mahia community but were taken down a couple of hours later."
Police ask for anyone who may have viewed or saved these posts to contact them via 105 and quote file number 220302/3743.
''The man's injuries were initially reported to be an accident but are now being investigated as a grievous assault,'' Hunter said.
''Police know that a number of people hold information which will identify the person or persons responsible for the injuries to the victim,'' he said.
Police released a statement today urging witnesses or people with any information to contact the investigation team via 105 and quote file number 220302/3743."
Information can also be given directly to Detective Sergeant Eric Hunter at Gisborne Police Station.