More than 100 people are believed to be trapped in rubble after a deadly 6.3-magnitude earthquake rocked the southern New Zealand city of Christchurch on Tuesday.
Christchurch Mayor Bob Parker declared a state of emergency and ordered people to evacuate the city centre following the quake, which has killed at least 65 people. Parker said rescue teams including sniffer dogs were fanning out.
"The government is willing to throw everything it can in the rescue effort," Deputy Prime Minister Bill English said. "Time is going to be of essence.
"I rang my kids to say goodbye," said Ann Voss, interviewed by TV3 from underneath her desk, where she was trapped in a collapsed office building. "It was absolutely horrible. My daughter was crying and I was crying because I honestly thought that was it. You know, you want to tell them you love them, don't you?"
She said she could hear other people still alive in the building, and had called out to them and communicated by knocking on rubble.
"I'm not going to give up," she said. "I'm going to stay awake now. They better come and get me."
The Department of Foreign Affairs said it had no reports of any Canadians affected by the earthquake.
New Zealand Prime Minister John Key told reporters in Christchurch that the death toll was expected to rise.
"It is a just a scene of utter devastation," Key told TV One News. "This may be New Zealand's darkest day."
Earlier, a police statement said "multiple fatalities have been reported at several locations in the central city, including two buses crushed by falling buildings.
"Other reports include multiple building collapses, fires in buildings in the central [city] and persons reported trapped in buildings," the statement said.
Nathanael Boehm, a web designer, told The Associated Press that he was standing near a tram track when the quake struck just before 1 p.m., sending the eaves of buildings cascading onto the street.
"It was horrific. People were covered in rubble, covered in several tonnes of concrete," Boehm said, adding that he believed some of them had been crushed to death.
Christchurch's daily newspaper, the Press, reported on its website that witnesses said screams could be heard coming from the Pyne Gould Business building, where as many as 30 people were feared trapped.