New Zealand government on Monday has stated it will tighten gun laws in the wake of its worst modern-day massacre, as it emerged that the white supremacist accused of carrying out the killings at two mosques will represent himself in court.

Prime Minister Jacinda Ardern said her coalition was unified on the need to reduce the availability of the kind of weapons used by Brenton Tarrant as he went room to room shooting Muslims gathered for Friday prayers.

“We have made a decision as a cabinet, we are unified,” she said, flanked by her coalition partner and deputy prime minister, Winston Peters.

Peters, whose New Zealand First party has previously opposed changes, said he backed the prime minister fully.

“The reality is that after 1:00 p.m. on Friday, our world changed forever, and so will our laws,” he said.

Ardern, the youthful premier who has become the face of the nation’s tragedy, said there would be an inquiry into the horrifying attack, as questions swirl over whether intelligence agencies should have spotted warning signs.

The role of social media has also come under the limelight, after the gunman live-streamed his rampage on Facebook.

As a teenager, whose name cannot be published, appeared in court Monday charged with distributing that footage.