A medical cause has not been ruled out as having a part to play in the death of a Masterton forestry worker on Thursday.
The 31-year-old man was killed after the tree he was cutting down fell on him in a forestry block on Te Mai Rd, Tinui at about 12.30pm.
Masterton acting sergeant Andrew Stringer said police were assisting Worksafe with the investigation and medical issues had not been ruled out at this stage.
"It's not clear cut that it was purely a logging incident.
"The injuries sustained were not a 100 per cent conclusive that it was due to the tree."