The Vietnamese embassy in Wellington did not respond to a request for comment on the matter. Photo: AP PHOTO

Two Vietnamese officials accused of sexually attacking two young female servers at a Wellington restaurant won't return to face criminal charges after attempts to extradite them failed, New Zealand authorities say.

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NZ police would not disclose why efforts to return the men had stalled, but the two countries don't have an extradition treaty so Hanoi would have had to turn over the alleged attackers voluntarily.

The accused men were "associated with the police" in Vietnam, NZ

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