UPDATED 10.28am No fewer than three laser incidents involving commercial aircraft in the past 12 hours.

Several international flights approaching Auckland Airport have complained to police about a laser strike coming from the south Auckland suburb of Weymouth around 5.15am.

Police immediately sent patrols to the area but could not find anyone.

Airways NZ says a helicopter pilot's reported being targeted just after 9.40 last night, also in the Weymouth area in Auckland.

It says the agency followed standard procedure and immediately notified police.

Police are also scouring the Trentham area of Upper Hutt looking for whoever shone a laser into the cockpit of a commercial flight on its approach to Wellington Airport.

Two pilots on board the flight from Hamilton were temporarily blinded by the bright green laser just after 8 last night when it was at an altitude of around 10,500 feet.

The plane landed safely.

The police are also asking for public help to find those responsible.

The Civil Aviation Authority has reacted with anger saying it's totally unacceptable for the safety of hundreds to be jeopardised.

CAA spokesman Mike Richards is pleased police are onto the matter immediately.

He said it's infuriating and just crazy that someone would shine a high-powered laser at an aircraft.

Auckland Rescue Helicopter pilot James Taylor said it's extremely distracting, especially when pilots are concentrating on trying to land.

"Depending on the power of the laser they're quite capable of causing permanent damage to a pilot's eyesight and of course for us we are only flying with one pilot in the helicopter so it's a pretty bad thing for everybody."

He said even if the laser's been turned off, it takes a while to be able to see properly again.

Airline Pilots Association President, and himself a pilot Tim Robinson, says laser strikes are seriously dangerous.

"This can have a huge effect on flight safety and putting passengers at risk. These folk really have to think hard before they obtain these lasers and decide to point them at aeroplanes. It's very serious."

Just this week a man was due for sentencing in Christchurch over a similar laser incident.