CHRISTCHURCH, New Zealand -- Police in Christchurch, New Zealand, are rejecting suggestions that rescuers have abandoned hope of finding more survivors of Tuesday's devastating earthquake.
But they are calling it a recovery operation now.
At least 75 people were killed in the quake and some 300 remain missing. Authorities say no trapped survivors have been found since 2 p.m. Wednesday. It's now Thursday in New Zealand.
Still, police superintendent Russell Gibson tells National Radio that there are pockets inside a number of buildings where survivors might be found.
Many sections of Christchurch lie in ruins. Police have announced a nighttime curfew downtown to keep people away from dangerous buildings and to prevent crime.
Fire officials say one of the city's tallest buildings is showing signs of buckling and is in imminent danger of collapse. Authorities have emptied the 27-floor Hotel Grand Chancellor and evacuated a two-block radius.
Police have arrested six people since the quake struck for burglary and theft.