There are frustrations from migrants waiting to return to New Zealand.

It's been revealed about 2000 rooms are empty at managed isolation facilities across the country.

Immigration adviser Katy Armstrong told Heather du Plessis-Allan Government bodies say the empty beds are for contingency. 

She says it needs to be made clear only two thirds of MIQ beds are being used.

"We've got families who are split apart with really serious humanitarian issues going on. There's something wrong, there's a disconnect, and we just want to make sure our managed isolation is being used appropriately."

In a statement, the Managed Isolation and Quarantine says those beds include rooms set aside for quarantine, live-in staff, air or ship crews, and rooms set aside as a contingency for incidents such as natural disasters or guests needing to be moved between facilities.

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