The livestream began as the gunman drove to the Al Noor Mosque in Deans Ave, parking his auto in a nearby driveway.
The Christchurch Mosque shooting has left estimates of upwards of 50 injured, according to oscillating reports in the wake of the tragic event. Peneha, who has lived next door to the mosque for about five years, said the gunman ran outside, dropped what appeared to be a semi-automatic weapon in Peneha's driveway, and fled before emergency services arrived.
He fired more shots on the street at no apparent target, and said: "Looks like we won't get the bird today boys".
There were also reports of a third active shooting unfolding outside Christchurch Hospital and and a auto bomb in Strickland St, but these two incidents were yet to be verified.
About 20 officers are clearing nearby buildings, while Christchurch schools have been placed on lockdown.
"Police are responding with its full capability to manage the situation, but the risk environment remains extremely high", Bush said in the statement.
Residents of Christchurch were also asked to stay indoors.
New Zealand police said that a "serious and evolving situation is occurring in Christchurch with an active shooter".
Another witness told TVNZ he heard gunfire at around 1.45pm local time.
Canterbury Police have confirmed they are responding to a "critical incident" at the location.
The gunman stalked the mosque rooms, firing repeatedly, stopping several times to re-load, NZ Herald reported.
He said the gunman was white and was wearing a helmet with some kind of device on top, giving him a military-type appearance.
"I can see a girl dead in the middle of the road", Ibrahim said in tears.
"For now my thoughts and I'm sure the thoughts of all New Zealanders are with those who have been affected their families", she said.
Students participating in the city's Fridays for Future climate march were confirmed to be safe, Mayor Lianne Dalziel told the New Zealand site Newshub.
At least two mosques were attacked, both in Christchurch.