Australian sportsman Anthony Mundine has arrived in Christchurch to show solidarity with the victims of the mosque terror attacks.
The boxer, ex-rugby league star, and prominent Muslim said he was back home when his son showed him some footage of the tragedy.
At first, he thought it was a prank. And then his heart "just melted".
"It seemed pretty surreal, I thought it was a video game," he said.
"When I come to realise it was the truth, my heart just melted man. I just felt I had to be here and to show my support, show my aid to the people.
"It's my duty as a Muslim brother to come to support and aid the families and victims of this tragedy.
"What happened was obviously very horrific and very bad and sad, as far as what went down, but God willing the good will come out of this."
Yesterday, he visited several survivors in hospital.
Hearing their stories, was "really emotional".
"Just being there and hearing what they had to go through… They are lucky to be here."
"The footage I saw… for them to live through that and to see dead bodies and see people being murdered, I wouldn't wish that upon my worst enemy."
Mundine paid tribute to Prime Minister Jacinda Ardern's leadership.
He said she's led from the front with compassion, empathy and class.
"She couldn't do anything more to show that respect and I take my hat off to her," he said.
"The whole world's leaders can really take a leaf out of her book. It's the first time I've seen a PM lead with her heart and do the right thing instead of being led a different way."
He hoped that the tragedy will help people learn and understand more about Islam.