That wraps up today's coverage

AP

That's where we'll end our blog of this horrific day in New Zealand attack that saw 49 people killed in Christchurch

New Zealand Prime Minister Jacinda Ardern described it as "one of New Zealand's darkest days", while Australian PM Scott Morrison labelled it "extremist, right-wing" terrorism.

The last we heard from New Zealand Police there were four people in custody, including one man in his late 20s who has been charged with murder and will face court on Saturday morning, and a person who "may have had nothing to do with this incident".

There is still a lot of this story to be told and we'll be bringing it all to you tomorrow with another live blog and rolling coverage through the day.

I hope you can sleep peacefully tonight. All the best and we'll see you in the morning.