Image copyright EPA, Getty Images, Reuters
Forty-nine people have been killed and 48 wounded in shootings at two mosques in Christchurch, New Zealand, in the deadliest attack in the country's history.
New Zealand Prime Minister Jacinda Ardern called it one of New Zealand's "darkest days".
Here's what we know so far about how the attacks unfolded.
The first shooting took place at the Al Noor mosque, in central Christchurch.
A gunman using the name Brenton Tarrant live-streamed footage of his rampage to Facebook, filmed with a head-mounted camera.
Footage showed the man, armed with semi-automatic weapons, firing indiscriminately at men, women and children from close range inside the mosque.
The attacker's headcam footage begins in an industrial estate on Leslie Hills Drive, just west of Al Noor mosque.
It shows him driving south on to Mandeville Street and Blenheim Road towards the city centre before turning north up Deans Avenue.
He reaches the mosque a few minutes later, pulling the car into an alleyway at the side of the building and turning the car around to park facing Deans Avenue.
The suspect then gets out, selects a weapon from the boot of the car and walks to the building, where he begins his deadly attack on worshippers inside.
This was approximately 13:40 local time (00:40 GMT).
Six minutes later, he drives along Deans Avenue, around the Botanic Gardens to Bealey Avenue, where his headcam footage cuts out.
The second attack then took place a little later five kilometres away at Linwood Mosque, east of the city centre.
Attack 1: Al Noor mosque, 41 dead
Image copyright EPA
Officers responded to reports of shots fired at the mosque during Friday prayers at about 13:40.
By 14:11 police confirmed they were attending an "evolving situation" and schools went into lockdown a few minutes later.
At 14:30 police confirmed the incident involved a gunman.
The headcam images show the gunman passing from room to room, killing as he goes and shooting the wounded from close range.
The attacker targeted both the men's and women's prayer rooms.
Witnesses told local media they ran for their lives, and saw people bleeding on the ground outside the building.
"There were bodies all over," one man said.
Attack 2: Linwood mosque, eight killed (one dying in hospital from injuries)
There were fewer details about the attack in the Christchurch suburb of Linwood.
Survivors told local media they saw a gunman in a black motorcycle helmet open fire on about 100 people praying inside.
Police Commissioner Mike Bush described the twin attacks as a "very well-planned event". Firearms were recovered from both scenes.
Two IEDs (improvised explosive devices) were found in a car and neutralised by the military, police said.
Australian national Brenton Harrison Tarrant, 28, appeared in court in Christchurch a day later charged with murder.
The New Zealand resident was remanded in custody.
A man with the same name appears to have published a manifesto before the attack outlining his intentions. He identified himself as a 28-year-old Australian citizen and espoused far-right and anti-immigrant ideology.
Two other men and one woman were detained nearby and firearms seized. Officers are investigating whether they were involved.
By Dominic Bailey, David Brown, Salim Qurashi, Debie Loizou, Lucy Rodgers and Prina Shah.
An Australian, , aged 28, appeared in  District Court, New Zealand yesterday, charged with one count of murder pertaining to a  on Friday, which caused the death of at least 50 people. Judge Paul Kellar ordered the accused remain in custody until his next court appearance on April 5.

Police alleged the accused performed two attacks. The first attack reportedly was in  at about 13:40 local time (0040 ), which left at least 42 people dead. The second attack reportedly was in , killing at least eight people, on the same day. Brenton Tarrant did not apply for bail. Further charges may be laid in the future, police said.

Police arrested the accused in the neighborhood of Strickland Street, 36 minutes after the mass shooting in Al Noor Mosque according to police. After his arrest on Friday, Brenton stayed in the Christchurch central police station overnight before appearing in court on the next day.

Brenton Tarrant had a valid gun licence allowing him to buy weapons, ABC reported. According to New Zealand Prime Minister , Brenton had a licence for the five firearms he allegedly used for the attack — two semi-automatic, two shotguns, and one lever-action. Professor Greg Barton, Chair In Global Islamic Politics in the Faculty of Arts and Education at the , said "The attacker was using a couple of guns, one was a shotgun, one was an  — that's the so-called civilian equivalent of the . It's an ". The authorities seized these firearms.

Prime Minister Ardern said at a press conference yesterday morning the gun laws should be changed. She said, "I have instructed  Officials Committee for Domestic and External Security Coordination to report to Cabinet on Monday on these events with a view to strengthening our systems on a range of fronts including, but not limited to, firearms, border controls, enhanced information-sharing with Australia, and any practice reinforcement of our watchlist processes."

Brenton also allegedly released an anti-Muslim document online, outlining political motivation, prior to the murders. Social media have been struggling to censor the alleged gunman's videos of the murder, according to reports.