A major search and rescue operation is underway off the Coromandel coast after a mayday call from a sinking yacht with two people on board.
The Rescue Coordination Centre got a distress call at about 6.30pm giving the vessel's location near Waiheke.
Search and Rescue officer Tracy Brickles said an initial search failed to find the yacht and they now believed it was east of the Coromandel.
Two rescue helicopters, a Coastguard boat and the Navy's Te Kaha are searching both the original position as well as the coast off Pauanui.
"We understand that two people are on board the yacht but we have no further information about the yacht, or what may have caused it to take on water, at this time.
"We have serious concerns for the safety of those on board. We urge anyone with any information or possible sightings to contact police immediately by calling 111."