The New Zealand city of Chirstchurch is in a state of emergency after an earthquake stuck, killing an unknown number of people and causing mass destruction.

The quake has measured 6 point 3 on the richter scale - but has caused for more damage than last year's quake.

Dozens of buildings have collapsed, the city's cathedral has been badly damaged.

At least two buses have also been crushed by falling debris crushing those inside.

Police have confirmed lives have been lost, but can't yet say how many.

It's also feared many people are still trapped in collapsed buildings

Christchurch residents are being told not to drink the water, flush toilets or use stoves and ovens for the time being.
Roads have collapsed and infrastructure has been badly damaged in the quake leaving communication down
Christchurch Mayor Bob Parker says the city is in a very unstable position.

Wallabies coach Robbie Deans has family there  and says the area was just recovering from last year's quake.

Christchurch airport has opened for emergency evacuation flights only, all other flights are being diverted.

The airport has suffered extensive damage following the quake -- forcing all incoming flights to be diverted to Wellington and Auckland.

A 40 person search and rescue team from Australia is on its way to New Zealand to help local authorities deal with the Christchurch earthquake

Prime Minister Julia Gillard says at this stage there are no reports of Australian casualties as a result of the tremor

Consular officials are on the ground in Christchurch to assist Australian citizens.
Ms Gillard has told parliament she's spoken to the New Zealand Prime Minister John Key and stands to provide any help the country needs.