Another report's highlighted Maori mental health patients being confined on their own in seclusion more than others

The Chief Ombudsman's third report in less than a year highlights troubling issues at a Palmerston North Hospital mental health inpatient unit.

Peter Boshier is asking the Ministry of Health to look into it - and says the practice seems to be increasingly used for Maori.

He highlighted the issue in a Bay of Plenty mental health unit a week ago - and at a Whanganui facility last year.