A police search and rescue operation has been mounted after four teenagers were reported overdue in their attempts to travel via the Manuherikia River to Ophir Bridge this afternoon.
It is understood that the four teenagers have later been found, apparently safe and well, near a bridge in the gorge.
The area is believed to be difficult to access by road, and air access may be needed to bring them out of the area.
A police spokeswoman said the teenagers, apparently aboard kayaks, a lilo and an inflatable doughnut, had set out about 2.15pm and had been expected to reach the bridge about ninety minutes later.