A full review will investigate an overnight rooftop protest by six teen inmates at Hawke's Bay Regional Prison.

Two climbed down this morning, and the last four finally surrendered to corrections officers.

The stand off apparently kicked off when the group weren't allowed in the sports area yesterday.

There is damage - including broken windows.

Corrections Chief Custodial Officer Neale Beales told Heather du Plessis-Allan the prison negotiation team talked the young men down without further intervention.

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