At least three more reports of assault against staff by patients have been made since Friday, Australian Nursing and Midwifery Federation's ACT branch secretary Matthew Daniel said.

Mr Daniel last week told The Canberra Times there was an imminent risk of a "catastrophic event" at Dhulwa, with a culture that pitted patient rights against the rights of nurses.

In the six months to February, Canberra Health Services said it received 83 reports of assault, but the union said the numbers were actually higher, with Mr Daniel saying nurses were recording statistics themselves.

Opposition health spokeswoman Leanne Castley also said she had received further reports on Tuesday, detailing that since Monday "one nurse was assaulted resulting in a fracture, a staff member was hit in the face and a doctor and security guard were attacked and needed hospital treatment".

A Canberra Health Services spokesperson on Tuesday said it was very concerned for team members affected by these incidents but that "no fractures were sustained as a result of the incidents yesterday".

A spokesperson on Wednesday clarified that a minor fracture had been sustained and the first statement was made in error.

The spokesperson on Tuesday said CHS was working with both WorkSafe ACT and the union to ensure nurses and other staff were supported and to prevent and manage occupational violence.

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Mr Daniel said WorkSafe attended the facility on Monday, but the union was not clear on the details of their inquiries.

In a statement, the territory's work health and safety regulator confirmed it "has received complaints about Dhulwa Mental Health Unit and is responding to these complaints in the same manner as it responds to all complaints."

"Appropriate enquiries are being undertaken by the inspectorate and we will make no further comment on this matter."

Both the nursing union and Canberra Liberals have called for an independent review into the mental heath unit, with Mr Daniel saying members were concerned about the broader workplace culture at the facility.

"Our members really are wanting to know if there's going to be an inquiry," he said.

"They believe that's the best way forward, there's so many issues apart from occupational violence, that includes culture, that they believe only an inquiry will get to the bottom of."

Mr Daniel said the territory government have "moral obligations to do everything they can possibly do, to keep nurses and midwives safe right now."

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