This frame from video that was livestreamed Friday, March 15, 2019, shows a gunman, who used the name Brenton Tarrant on social media, in a vehicle before the mosque shootings in Christchurch, New Zealand.
Two other people were in custody and police said they were seeking to understand whether they were involved in any way.
Whether there are more suspects - Prime Minister Jacinda Ardern has said the government has no reason to believe there are more suspects, but was not assuming that was the case and intelligence services and police were working on establishing this. "More importantly it was also about standing in solidarity in a small way to offer their love and support to the people of Christchurch".
Investigative authorities, with their eyes trained elsewhere, are thus entirely in the dark about these networks that actively inspire and recruit individuals to carry out such attacks. One person was later released. The attack was the worst ever peacetime mass killing in New Zealand and the country raised its security threat level to the highest.
In Australia, which is seen as culturally similar to New Zealand and has lively farming and hunting communities, the catalyst for outlawing high-powered weapons was the shooting of 35 people at Port Arthur in Tasmania in 1996.
Mr Graystone said he chose to stand outside the Medina Mosque on Friday because he "wanted to make sure that people know we can respond with friendship".
Many people were responding to the targettng of Muslims in a place of worship and the contents of a manifesto linked to the man who has been charged with the attack, that contained white-supremacist and anti-immigrant opinions. Police say he spent little time in Australia during the past four years.
New Zealand Police Commissioner Mike Bush said it took just 36 minutes from the first emergency call at 1.40pm local time (12.40am GMT) before the suspect was in custody.
Australian Prime Minister Scott Morrison described the suspect as an "extremist right-wing violent terrorist". Two improvised explosive devices had been found in the auto and disabled.
"One leg of an injured needed to be amputated while another suffered bullet injuries in his chest", Rahman Bhuiyan said. Ardern said more charges would be laid. Tarrant lived in Dunedin, on New Zealand's South Island, and was a member of the Bruce Rifle Club, according to media reports which quoted club members saying he often practiced shooting an AR-15, which is a lightweight semi-automatic rifle. He said he then went into the mosque to try to help.
In the years since the 2011 Christchurch quake, which left 185 people dead and the quaint cathedral city in ruins, the authorities paused the region's refugee resettlement programme while they attempted to rebuild the city centre. Foreign Ministry spokesman Sufian Qudah had earlier said that a Jordanian man was killed and eight others were wounded.
Mr Nabi said his father, who ran the Afghan Association, was killed as he tried to save another person from the gunman. He said one was slightly injured.
"I was running and there was a guy [who] said there was a shooting in the mosque so I was running, while I was running there was a lady being shot", he said. I am just posting this video to show that I am OK.
He said the gunman was white and was wearing a helmet with some kind of device on top, giving him a military-type appearance.
Fiji-born Azan Ali, 43, who was in the Linwood Mosque with his Auckland-based father when the attack occurred, trembled when he thought back to crack of the gun shots on Friday.