Major aftershock rattles New Zealand's South Island

A strong, new 6.2-magnitude earthquake has shaken New Zealand's South Island, hours after a more powerful quake killed at least two people and sent thousands fleeing to higher ground.

Các thùng hàng xô lệch nhau tại Centre Point ở Wellington Source: AAP

The original quake, now upgraded to 7.8 magnitude, struck just after midnight about 90 kilometres north-east of Christchurch.

There are reports of more injuries, along with damaged roads and buildings.