Wairarapa police are trying to identify four people after a "terrifying" aggravated burglary.
The plant was closed after a pea weevil incursion.
"Our thoughts are with the family at this terrible time."
A severe shortage of medical staff is forcing them to travel elsewhere.
It happened on Monday morning.
Officers were called just after 5am on Monday morning.
The snorkellers who went missing off the Wairarapa coast have been named.
Police failed to find the pair on Friday after they were reported missing before midday.