Mevlut Cavusoglu, Turkey's foreign minister, also said the attack was a deliberate demonising of Muslim political struggles. Then, she saw victims come streaming out of the mosque, some of whom she helped find medical aide.
"My warmest sympathy and best wishes goes out to the people of New Zealand after the terrible massacre in the Mosques", he tweeted.
- All schools in Christchurch were put on lockdown and mosques told to close their doors.
Ms Ardern said the events in Christchurch represented "an extraordinary and unprecedented act of violence" and acknowledged many of those affected may be migrants and refugees.
The pope was "deeply saddened to learn of the injury and loss of life caused by the senseless acts of violence", Vatican Secretary of State Pietro Parolin said in a telegram. Dunedin is a city near the southern tip of New Zealand, around 225 miles from Christchurch.
"Far too often, Muslims suffer unimaginable loss and pain in the places where they should feel safest", Trudeau said in a statement.
The South African Jewish Board of Deputies (SAJBD) has issued a statement following the shooting of two mosques in Christchurch, New Zealand, which have resulted in the confirmed deaths of 49 people so far.More news: Vietnamese woman loses bid for release
U.S. president Donald Trump said that his "warmest sympathy and best wishes goes out to the people of New Zealand after the terrible massacre in the mosques,".
The 74-page document says the shooter was inspired by right-wing extremists in the United States - including Charleston church shooter Dylann Roof, who killed nine people in 2015.
"We would strongly urge that the link not be shared".
"New Zealand Police alerted us to a video on Facebook shortly after the livestream commenced and we removed both the shooter's Facebook account and the video".
New Zealand Prime Minister Jacinda Ardern added, "It is clear that this can now only be described as a terrorist attack".
On Saturday, the prime minister said the "primary perpetrator" in the shootings was a licensed gun owner and legally acquired the five guns used.
"We have four people in custody. It's very grave, it's very serious", he told reporters.More news: Osaka shrugs off Indian Wells upset
Police warned Muslims against going to a mosque anywhere in New Zealand. Police do not believe there are any other suspects but said it was still an open investigation.
"There were a number of IEDs attached to the vehicles that we also stopped".
"The two other people that have been apprehended, again in the possession of firearms in the general environment, we are working through to understand what their involvement is", he said. One person with us had a bullet in her arm.
Three others are in custody.
He said he chose New Zealand because of its location, to show that even the most remote parts of the world were not free of "mass immigration".
At least 49 people were killed in mass shootings at two mosques full of worshippers attending Friday prayers in an attack broadcast in horrifying, live video by an immigrant-hating white nationalist wielding at least two assault rifles and a shotgun.
At the same time, the Canterbury District Health Board said that at least 48 people, including little children, were being treated at the Christchurch Hospital.More news: MPs REJECT amendment requesting to delay Brexit until June 30