A 42 year old man allegedly behind a stabbing in a Dunedin supermarket has appeared in court

He is facing four charges of attempted murder -- and his identity remains secret for now.

It's alleged the man attacked two staff members and a couple at a Countdown supermarket in early May.

They've since been discharged from hospital -- and security staff are now stationed in the store.

The Otago Daily Times reports the defendant will keep name suppression while a psychiatric report's completed.

He'll reappear in court later this month.