For updates later in the day - go here
9.05am - Donald Trump is speaking to media in America about the attacks.
"I told the Prime Minister that the United States is with them all of the way, 100 per cent. Whatever they need we will be there."
"New Zealand has been a great friend and partner for many years. Our relationship has never been better."
8.50am - "It's indescribable emotion really for the massacre that's taken place here and particularly in my hometown," he said.
8.48am - John Campbell spoke to Stuart, who worked in Saudi Arabia and has close ties to the Islamic community there and in NZ, as he laid flowers at Deans Avenue this morning.
8.44am - "He is not from here, he came here with hate in is heart and intention to kill in his mind," she said.
8.42am - "There are no words for the revulsion I feel for the propaganda he wanted to bring this," Christchurch Mayor Lianne Dalziel said.
8.34am - The wall along Rolleston Ave near the Botanical Gardens (and the hospital) is available for floral tributes.
8.32am - She says she wants to show support, love and compassion to the city's Islamic community.
8.30am - Christchurch mayor Lianne Dalziel says her heart goes out the victims and their families. She also paid tribute to the police and first responders for their bravery.
8.27am - Mr Bridges says he will be travelling to Christchurch with Jacinda Ardern to show solidarity and unity.
8.25am - Opposition leader Simon Bridges told 1 NEWS his "heart goes out to the victims, their families, the Islamic community and the people of Christchurch".
8.20am - Farhaan Farheez was at the mosque in Linwood yesterday for Friday prayers and spoke to 1 NEWS.
“I saw people being shot at like they were animals,” he said.
“I’ve never experienced something like that before in my life, it’s really devastating.”
8.02am - People in Christchurch are placing flowers inside the police cordon on Deans Ave and some of them spoke to 1 NEWS.
"We have to be brave, we have to get out, we can't cower in our homes behind our gates, we have to come out, I woke up this morning and I felt ashamed, I felt like we had to say sorry to these people," one woman told John Campbell.
"We need to ask the Muslim community for forgiveness I think."
7.59am - Christchurch Mayor Lianne Dalziel and Prime Minister Jacinda Ardern are due to front media at 8.30am and 9.00am respectively. We'll bring both of those to you.
7.45am - Ms Clarke also said she would expect authorities and social media platforms to pick up the hate speech that those responsible for these attacks were spewing online.
“I do find it odd that he could post his messages alerting people to his manifesto signalling that he was about to do so, something horrible, this not to be picked up.”
"Then he was live streaming for it what, 17 minutes? Facebook doesn’t close that down, I mean what is going on here.”
She also called for New Zealand to tighten its gun laws.
7.42am - Earlier, former Prime Minister Helen Clarke said, "right now in New Zealand everyone is in grief and shock."
7.28am - Two of the 42 injured are critical and this includes a four-year-old child who is being transported to Starship Hospital this morning.
7.25am - The statement continues:
Police wish to notify the public of the Restoring Family Links (RFL) website(link is external) where people can register missing persons or register themselves as alive. People living in New Zealand can also register missing persons on 0800 115 019.
Information will continue to be provided as it becomes available.
Our thoughts remain with all of those affected.
7.23am - Police have just given another update:
"We are continuing to make enquiries after yesterday's tragic events in Christchurch.
As the Prime Minister stated yesterday, this has been designated a terrorist attack.
Forty-nine people have died and 42 are being treated for injuries. Two of those injured are critical and this includes a four-year-old child who is being transported to Starship Hospital this morning.
Forty-one people were killed at the Deans Avenue mosque, and seven at the Linwood Avenue mosque. One has since died in hospital.
Our thoughts go out to those who have been affected by this unprecedented event.
A 28-year-old man will appear in Christchurch District Court today charged with murder. Two others remain in custody."
7.21am - Ross McGuiness told 1 NEWS he stared at the man who attacked the mosque on Deans Ave as he reloaded his weapon in front of his house.
7.05am - 1 NEWS reporter Jordan Oppert says police at the scene have not been able to confirm whether the man who has been charged with murder was responsible for the attack on Deans Ave and the one in Linwood.
6.50am - Last night, police also issued a statement saying they were at a property in Dunedin, a location that was of interest in relation to the attacks in Christchurch yesterday.
6.32am - Spark's managing director has given an update on the company's efforts to stop sites from distributing the live stream of one of the attacks.
6.22am - A woman who lost a man she considers a granddad in one of the terror attacks spoke with 1 NEWS last night. You can read more about that story here.
6.15am: Christchurch Airport has issued an update on social media saying they be screening all departing passengers today.
6am: Tributes from all over the world have been flooding in with The Queen tweeting her condolence to the victims. President Trump, Barack Obama and other world leaders have also tweeted their condolences.
Overnight Facebook also released a statement saying: "Our hearts go out to the victims, their families and the community affected by this horrendous act. New Zealand Police alerted us to a video on Facebook shortly after the live stream commenced and we quickly removed both the shooter's Facebook and Instagram accounts and the video. We're also removing any praise or support for the crime and the shooter or shooters as soon as we're aware."
What we know: Police confirm there are 49 people dead in the attack, 41 people were killed in the Deans Ave mosque, with seven killed at the Linwood mosque.
Another person died in hospital.
A 28-year-old man has been charged with murder and is due to appear in the Christchurch District Court this morning.
Two others remain in custody.
Another person was arrested earlier today however that was not related to these events.
The number of those being treated in hospital has been updated to 48 people.