New Zealand Police have released new pictures of additional campsites that Tom Phillips is said to have used to hide from authorities while on the run with his three children.

Phillips was killed in a shootout with police in the early hours of September 8, ending a near four-year hideout.

The new images, thought to be the family’s main campsites, show two large, “established” and “heavily concealed” structures in the "dense bush" of Marokopa.

Detective Superintendent Ross McKay said Phillips and the children likely "moved frequently" between these camps, another site near Te Anga Road, and other locations around Marokopa.

“For the last few weeks, Police have been piecing together information and building a picture of Phillips’ movements."

“What is now clear is that Phillips moved regularly from coast to farm to bush in a complex manner that meant he was unlikely to be stumbled across."

“Local Search and Rescue staff located the new sites - one to the north of Marokopa, the other to the east - which included partially buried, semi-permanent structures concealed by large amounts of vegetation," Mckay said.

Police have removed a “significant number of items” from the campsites for forensic examinations.

All sites have now been cleared, but authorities won’t be releasing their exact locations.

“This is a protracted and labour-intensive exercise that forms part of our ongoing enquiries to identify anyone who may have assisted Phillips," Mckay added.

“We continue to make good progress and believe he was assisted by a small number of people at different stages over the last four years.”

Mckay also gave an update on the police officer who was shot in the head during the altercation with Phillips, saying that he "is making a slow but steady recovery".