Foreign minister Murray McCully said that despite the country's claim that the launch was for peaceful purposes, it violated UN Security Council Resolutions, aggravated tensions and undermines attempts to build peace and stability, Newstalk ZB reported.
He urged North Korea to abide by its obligations under those resolutions, cease its provocations and take steps to dismantle its nuclear program.
An expert on North Korea said he believed the country was trying to stand up to the US with today's long-range rocket launch.
Retired Victoria University academic Dr Tim Beal said the United States and North Korea made an agreement earlier this year in which the Americans promised food aid in exchange for no long-distance missile launches.
He said North Korea was saying two things to the Americans: "We need to negotiate because they are getting stronger, we'd be able to attack if you attack us and saying that you have to respect our sovereignty."
Weapon of mass dysfunction
North Korea launched its long range rocket at 7.39am local time (10.39am NZT) - but it appears the launch was not successful. A US official told CNN the rocket launch had failed. The rocket made it off the launch pad, however it may have fallen apart soon after.
North Korea says the release of the Unha-3 (Galaxy-3) rocket - ostensibly carrying a satellite payload - was timed to coincide with Sunday's centenary of the birth of its founding leader Kim Il-Sung.
Western critics see the launch as a thinly veiled ballistic missile test, banned by United Nations resolutions.
"North Korea launched a long-range rocket at 07:39 am,'' a defence ministry spokesman told AFP.
The ignition of the rocket was seen from a US satellite watching the launch.
Japanese officials told Japan's NHK World the US Army detected heat around the launch pad, but there is no evidence of a flight path.
Japanese defence minister Naoki Tanaka told media a projectile was launched and it flew for a minute, but may have fallen into the sea, NHK World reported.
Tanaka did not specify where the rocket landed, but there had been no damage to Japanese territory.
Asian countries on full alert
Japanese Prime Minister Yoshihiko Noda said his country was on full alert, while urging North Korea to show "self-restraint until the last minute".
"But we want to be fully prepared for any possible contingency," Noda said, after ordering the deployment of anti-missile batteries on land and at sea to shoot down the rocket if it threatens Japanese territory.
Like Japan, the Philippines ordered flights to divert to avoid being in the Pacific area where debris from the rocket might fall. The UN's maritime agency has also warned shipping to be on alert.
- AFP
