Police Commissioner Mike Bush said that one person is in custody but the police are not sure whether there is anyone else who suspects them.
"As far as we know (the shot occurred) at two locations, a mosque at Deans Avenue, and another mosque at Linwood Avenue," Bush said. "We are not sure whether there are any other places outside that area that are threatened."
Bush said they were "dealing with a series of serious and tragic events in the Christchurch Canterbury area" and warned people to stay off. the streets. He asked anyone who was thinking of going to a mosque anywhere in New Zealand today without going. Closing your doors until you hear from us again, "he said.
New Zealand's Prime Minister, Jacinda Ardern, held a press conference in two shooting in Christchurch, describing it as" one of the most recent days. " in New Zealand. "," she said.
Ardern said that the attacker had no place in New Zealand.
"My thoughts are now and I am sure that all New Zealand ideas are with those who have an impact on their families," she said.
The police said they were engaged in mobilizing all national police resources to respond to the incident.
Parts of Christchurch were locked as armed police were deployed after receiving shots reports released in the city center at 1
Speaking to CNN, Mohan Ibn Ibrahim witnessed that he was inside the mosque when the shooting started and he heard the gunman "shooting continuously for ten to 15 minutes."
"I was in the mosque. There were more than 200 people inside the mosque, the guns came out of the back. Many hands glass and bricks should be bake on the back of the mosque," he said.
"I came to the street I saw that one person got a shot on his chest," he said, adding that the ambulance and police arrived on the spot there.
He said he had a friend in another mosque in the district who told him that a man also opened a firearm and that five were dead.
"I couldn't touch two of my friends who are in the mosque," he said.
A spokesman at Christchurch Hospital told CNN that there were "multiple" casualties, but he did not confirm the number.
The police are aware of a video shared online and not verified by CNN that purports to show a gun man walking into a mosque and without open fire.
"The second shot, rhythm, was a lot of people sitting on the floor," he said. "The gun (at the) had a front door, a rhythm behind the mosque and I was sitting behind … and I called the police."
According to TVNZ, Nazir saw many deaths and injuries, including three women on
Bush said in a statement that "all Christ's schools have been locked."
"The police call no one in the center of Christ to stay out of the streets and report any suspicious behavior to 111," he said .
A video posted on Twitter showed that the Bangladesh cricket team were walking out of the mosque. Speaking to CNN, coach of the team said that their bus pulled up at the mosque when the shooting took place.
Christchurch is a coastal city of 404,500 inhabitants. It is New Zealand's second most populous city behind Auckland and Wellington.
In 2010 and 2011 the city suffered a terrible series of earthquakes, with the most treacherous at size 6.3, which killed nearly 200 people and destroyed thousands of buildings.
This story developed.