"Even if we were to deport all Non-Europeans from our lands tomorrow, the European people would still be spiraling into decay and eventual death".
One man said the scene at the mosque was chaotic with as many as 40 people injured.
Cops fear there may be explosives in a crashed vehicle on a Christchurch street.
Police attempt to clear people from outside a mosque in central Christchurch, New Zealand, Friday.
Mass shooting at mosque in Christchurch
Mr Farouk said he believes members of the Bangladesh cricket team may have been worshipping at the mosque at the time.
About 20 officers are clearing nearby buildings, while Christchurch schools have been placed on lockdown.
"This is an evolving incident and we are working to confirm the facts, however we can confirm there have been a number of fatalities", commissioner Mike Bush said.
They said it was a scary situation with people running down Deans Avenue, with armed police all around the area.
"Police are responding with its full capability to manage the situation, but the risk environment remains extremely high", Bush said in the statement.More news: Senate Democrats: Working families would be hurt by 2020 budget proposal
Ardern said she was en route to Christchurch.
"There is no place in New Zealand for such extreme acts of unprecedented violence".
Bangladesh Cricket Board spokesman Jalal Yunus said most of the team were bussed to the mosque and were about to go inside when the incident happened. The deadliest in modern history occurred in the small town of Aramoana in 1990, when gunman David Gray shot and killed 13 people following a dispute with a neighbor.
The tape then shows the barrel of a weapon as the camera follows it, as if a first-person role-playing game. "Some were covered in blood".
"The second shot, I run, lots of people were sitting on the floor", he told media. Another witness said he saw "a man in handcuffs being led away by police".More news: Two more top Facebook executives leave the company
The man who claimed responsibility for the shooting said he was 28-year-old white Australian who came to New Zealand only to plan and train for the attack.
Police have advised that there may still be other offenders at large and are urging everyone in central Christchurch to stay indoors.
"They are safe. But they are mentally shocked".
All are reported to have escaped to safety across Hagley Oval, per Yahoo Sport.More news: Google employee breaks record, calculates 31.4 trillion digits of Pi