MOUNT MAUNGANUI, New Zealand: Rescuers dug into deep mud searching for at least six missing people Friday after a landslide from an extinct volcano crashed into a popular campsite in northern New Zealand.

Police said a 15-year-old was the youngest person unaccounted for after a chunk of Mount Maunganui plowed into holidaymakers Thursday, smashing a shower block, camper vans and caravans.

Battered vehicles were carted away after being pulled out of the mud.

Voices could be heard calling for help from beneath the rubble just after the mudslide, which struck the tourist spot following heavy rain that lashed a large swathe of New Zealand’s North Island.

But nothing has been heard since then, witnesses and emergency officials say.