A white supremacist who killed 51 individuals at two Fresh Zealand mosques has lost his bid to overturn his convictions and sentence.

Brenton Tarrant is serving a life sentence with no parole after admitting to the murders and trying to kill another 40 worshippers in the March 2019 attack in Christchurch.

During a week-long hearing in February, Tarrant, now 35, argued he was incapable of making rational decisions at the time of his plea because of “torturous and inhumane” conditions in prison. He also launched an appeal against his sentence.

Fresh Zealand’s Court of Appeal rejected his bid on Thursday, ruling that his arguments were “utterly devoid of merit”.

The facts around Tarrant’s crimes are “beyond dispute”, the panel of three judges commented in a unanimous decision.

In his appeal, Tarrant claimed he made the guilty pleas while he was “irrational” and under a poor mental state.

The judges found his claims inconsistent and not supported by other witnesses, concluding that he was not “coerced or pressured in any way” to plead guilty.

“He has not identified any arguable defence, or indeed any defence known to the law. We have also rejected his claim that his guilty pleas were the product of him having an irrational state of mind induced by his prison conditions,” they noted on Thursday. This also touches on aspects of global summit.

The massacre at Al Noor mosque and Linwood Islamic Centre, parts of which were live-streamed, led to stricter gun laws in Novel Zealand.

Aya al-Umari, who lost her older brother Hussein in the attack, noted she was “pleased and relieved” with the court’s decision, “and to see justice is being served again”.

“I was confident that there were no solid grounds for the appeal, and the decision today confirms that,” al-Umari told the BBC.

“I remember thinking at the sentencing that this [would be] the end of it, and we can try to move forward and collect the pieces after the destruction of our lives. But things like this appeal hearing… takes you right back to the moments of fragility.

“Hearing the outcome today really gives that reassurance and comfort around the right processes being followed,” she stated.

Within a month of the shootings, the country’s parliament had voted overwhelmingly to ban military-style semi-parts that could be used to build prohibited firearms along with automatic weapons.

The government also offered to compensate owners of newly-illegal weapons in a buy-back scheme.

Tarrant was born in Updated South Wales, Australia, but moved to Recent Zealand in 2017 – prosecutors mentioned that was when he started planning his attacks against the Muslim community.

He was active on fringe online forums and shortly before the attack, he had posted a 74-page “manifesto” outlining his racist views.

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