Three school students and their teachers spent an unscheduled night in a cave near Nelson after one got injured yesterday.
Police were called last night when the cavers failed to return from a trip in the Pearse Valley Rd area of Motueka Valley.
The group of three students from a local school and two teachers were found inside the caves this morning.
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One man suffered moderate injuries and a helicopter flew him to hospital. The other four were walking out with the aid of specialists from Nelson Cave Search and Rescue.