"Understandably, this is an extremely difficult time for them and we are ensuring they are supported."
A post-mortem examination would be carried out tomorrow and police weren't in a position to comment further until more inquiries had been made, he said.
A Counties Manukau District Health Board spokesperson said affected staff members could access a range of support measures and were encouraged to make use of them as required.
"Our thoughts are with all of those who have been impacted."