A 6.3-magnitude earthquake rocked the southern New Zealand city of Christchurch Tuesday, killing dozens, collapsing buildings and cracking streets.

Prime Minister John Key said at least 65 had died as a result of the disaster and told reporters that the death toll was expected to rise further. "It is a just a scene of utter devastation," he added.

Television footage showed streets strewn with bricks and shattered concrete. Sidewalks and roads were cracked and split, and hundreds of dazed, screaming and crying residents wandered as sirens blared throughout the city.

New Zealand's 3 News television station said that by 10:30 p.m. Tuesday local time (4:30 a.m. ET) that there were reports of at least 125 people being rescued.