Australian Brenton Tarrant appeared in a New Zealand court on Friday where the suspected white supremacist was charged with an additional 49 counts of murder at two mosques last month.
In an attack broadcast live on Facebook, a lone gunman armed with semi-automatic weapons targeted Muslims attending Friday prayers in Christchurch on March 15, killing 50 worshipers and wounding dozens of people.
Tarrant, who was charged with one murder a day after the shooting attack, was also charged with 39 attempted murders on Friday.
The High Court judge overseeing the appearance ordered Tarrant to undergo a mental assessment to determine whether he was fit to stand trial. He was not required to submit a plea.
Tarrant, 28, has been moved to New Zealand's only maximum-security prison in Auckland and appeared at the Christchurch High Court through a video link.
Tarrant was then remanded to custody until June 14.
High Court Judge Cameron Mander said whether Tarrant would be required to enter a plea at his next appearance depended on his mental health assessment and "any other developments".
Legal experts said two mental health experts would likely assess Tarrant, while police, who have not ruled out further charges, would continue to investigate New Zealand's worst peacetime mass killing.
Prison officials say Tarrant is under 24-hour surveillance with no access to media, according to news reports.
The Australian made several donations to far-right "identitarian" activists in Europe known for their anti-immigration stunts, Austrian daily Der Standard reported Thursday.
He made donations in 2017 and 2018, the daily said, citing security sources from Germany and Austria familiar with the investigations.
In 2017, the Australian made four donations totaling 2,200 euros ($2,500).
Sources quoted by the paper with knowledge of the probe in Germany said the money went to the French "Generation Identitaire" group.
However, Austrian domestic intelligence was still probing whether the money all went to a group in a single country, the paper reports.
Tarrant also donated 1,500 euros to Martin Sellner, the leader of the Identitarian Movement Austria (IBOe), in 2018.
Sellner, whose apartment was raided last week after authorities became aware of the link, has admitted receiving the donation but has denied having had any contact with him.
