The Queen said in her message: "I have been deeply saddened by the appalling events in Christchurch today". He did not mention the other three suspects and did not say whether the same shooter was responsible for both attacks.
"With this attack, hostility towards Islam, that the world has been idly watching and even encouraging for some time, has gone beyond individual harassment to reach the level of mass killing", Erdogan said at the funeral of a former Turkish minister.
In the wake of the slaughter, the prime minister said that immigrants "have chosen to make New Zealand their home, and it is their home". Reuters was unable to confirm the authenticity of the footage. In other forums, people discussed Muslim food restrictions as they prepared to drop off meals for those affected.
At the White House, Trump called the bloodshed "a awful thing" but rejected any suggestion the white nationalist movement is a rising threat around the world, saying it is "a small group of people that have very, very serious problems".
NEW Zealand's Prime Minister Jacinda Ardern has described as "unprecedented" a terrorist attack in that nation's third major city, Christchurch, which at present is said to be ongoing.
You may have chosen us but we utterly reject you.
"[Absolutely it impacts Muslims...] I do go to prayers at our mosque and [something like this] is always a concern of 'What if?'"
"I saw dead people everywhere". I shall visit mosques today to pay my respects and reassure friends.
He said: "An attack on a place of worship is an attack against all faiths, I'm confident that in the days ahead you will see all communities come together".
In Muslim-majority Malaysia, Anwar Ibrahim, the leader of the biggest party in its ruling coalition, said one Malaysian had been wounded in the attack he described as a "black tragedy facing humanity and universal peace".
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The visiting Bangladesh cricket team was arriving for prayers at one of the mosques when the shooting started but all members were safe, a team coach told Reuters.
Christchurch was put on lockdown with all schools and council buildings shut and roads closed across the city.
The shooting at the mosque on Deans Avenue next to Hagely Park, is near to Cathedral Square, where children were taking part in a global protest to raise awareness for climate change. Hospitals said children were among the victims.
Christchurch is a coastal city of 404,500 residents.
Mark Nichols told the New Zealand Herald that he heard about five gunshots and that a worshipper returned fire with a rifle or shotgun.
A man reacts as he speaks on a mobile phone near a mosque in central Christchurch, New Zealand, Friday, March 15, 2019.
It has been rebuilding since an natural disaster in 2011 killed 185 people and destroyed many buildings.
He described Christchurch as a "very peaceful city" that is still getting over the devastating 6.3 magnitude natural disaster that hit in 2011. We stand in solidarity with the people of Christchurch.