Video of massive damage after New Zealand earthquake

New Zealand officials warn there could be more aftershocks following a powerful earthquake near the southern city of Christchurch. An overnight curfew is currently in place across the city, as officials struggle to restore power and water. Two men were severely injured by the quake – they are in a critical condition. Officials say the damage has been immense -a state of emergency has been declared, and army troops remain on stand-by.