Four French tourists survived an eight-metre fall into a river after a cable on a Lake Waikaremoana Track bridge gave way on Thursday.
A cable on the Hopu Ruahine bridge on the track "released" about 1pm, Department of Conservation operations manager Mike Slater said, "and that's where people that were on the bridge have slipped off and fallen".
The tourists who were on the bridge at the time fell into the river below. "Fortunately, other than some scratches and a little bit of bruising, they are not seriously injured. That's a very fortunate outcome."
Mr Slater said a full investigation was under way to work out what had occurred. The bridge spans about 65m across the river and is 8.5m above the water at the start and end of the track. The bridge is rated for 10 people at one time.
"We've got a very comprehensive and robust asset management system," Mr Slater said.