Australian Prime Minister Scott Morrison confirmed that one of his citizens was among those who had "stolen the lives in a vicious, murderous attack that has claimed so many New Zealanders". "The situation is still unfolding but our thoughts and prayers are with our Kiwi cousins". "Not in New Zealand". New Zealand's gun laws permit private firearm ownership, but carve out a special, more restricted class of "military style semi-automatic" weapons.
The gunman's manifesto was a welter of often politically contradictory views, touching on numerous most combustible issues of the day, among them the Second Amendment right to own guns, Muslim immigration, terrorist attacks and the wealthiest 1%.
"My warmest sympathy and best wishes goes out to the people of New Zealand after the frightful massacre in the Mosques".
Among the deceased, 10 people were killed at the Linwood Islamic Centre while 30 others at the Al Noor Mosque in central Christchurch.
Witness Len Peneha said he saw a man dressed in black and wearing a helmet with some kind of device on top enter the Al Noor mosque and then heard dozens of shots, followed by people running out in terror.
"The United States strongly condemns the attack in Christchurch". The U.S. stands by New Zealand for anything we can do.
The suspect in an attack on mosques in New Zealand live streamed himself getting ready, going to the mosque and opening fire on worshippers who had gathered for prayers on Friday.
The gunman broadcast footage of the attack on one mosque in the city of Christchurch on social media. Police said the manifesto contains conspiracy theories and echoes white nationalism seen at protests that resulted in violence in Charlottesville, Va., in 2017.
It is clear that this can only be described as a terrorist attack. "It was an unprecedented act of violence", she said.
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"This was a very well planned event", Bush said, adding that the attack may not be limited to Christchurch and urging people to not visit any of the nation's mosques.
Iman Atta from the group said: "We are appalled to hear about the mass casualties in New Zealand".
Scotland's First Minister took to twitter to show solidarity with New Zealand's muslim community after the mass shootings in Christchurch.
British Prime Minister Theresa May offered deepest condolences "after the horrifying terrorist attack in Christchurch".
Spanish Premier Pedro Sanchez said his thoughts were with the victims, families and government of New Zealand after attacks by "fanatics and extremists who want to destroy our societies". "We stand together against such acts of terrorism".
Turkish President Tayyip Erdogan's spokesman condemned what he called a "racist and fascist" attack.
Recalling the scene inside the downtown mosque, where several hundred had been present for afternoon prayer, an eyewitness told Radio New Zealand, "There was blood everywhere".
"It's obviously very sad".
Norwegian Prime Minister Erna Solberg urged the worldwide community to combat all forms of extremism after the Christchurch attacks, which revived painful memories of the 2011 Breivik mass killings in Norway.