She continued by saying that it was indeed an act of terrorism, and New Zealand was targeted because they are a place that celebrates multiculturalism.
Official information on the attack itself is still being sorted out by the local authorities, although it appears as though the situation has been contained and all the offenders are in custody.
"We also cooperate with law enforcement to facilitate their investigations as required", it said. Authorities made Facebook aware of the video shortly after the video began, according to Mia Garlick, Facebook's director of policy for Australia and New Zealand.
New Zealand prime minister, Jacinda Ardern, also urged people not to share the footage during a press conference.
Police said there was a second shooting at the Linwood Masjid Mosque. Police also defused explosive devices in a vehicle.
As the country reels in the horror of today's mass shooting in Christchurch - which has lead to multiple deaths and injuries - Bush called for people to stay away from mosques, which were expected to be packed today for Friday prayers. PM Ardern added that the country was "enduring one of its darkest days".
When asked if police were looking for any other persons of interest related to the case, Bush responded that "we never assume that there aren't other people involved" but that "at this point we are not looking for any other persons". "There is no place in New Zealand for such acts of extreme and unprecedented violence, which it is clear this act was".
You can find the full statement by PewDiePie regarding the Christchurch, New Zealand mosque shooting below.
One witness told stuff.co.nz he was praying when he heard shooting - and then saw his wife lying dead on the footpath outside when he fled.
"She said while many people affected may be migrants or refugees "they have chosen to make New Zealand their home and it is their home. They are us. The person who perpetuated this violence is not", she said".