Fifteen people were killed and dozens injured a week ago when gunmen Naveed Akram, 24, and his father Sajid Akram, 50, opened fire with long-arm rifles on a gathering of Jewish people at a Hanukkah celebration at Bondi Beach.

A patient wounded in the attack worsened from a critical but stable condition to critical overnight at St Vincent’s Hospital.

Three of the 12 other patients still in hospitals across Sydney are critical but stable, meaning their injuries are life-threatening but not expected to quickly deteriorate.

Australians have been invited to light a candle at 6.47pm on Sunday and observe a minute’s silence to mark a week since the attack unfolded.

“The National Day of Reflection will be observed on the final day of Chanukah, a time traditionally associated with light, faith and resilience, making the loss felt by the Jewish community even more profound,” the prime minister’s department said in a statement.

Flags on Sunday will fly at half-mast, buildings will be lit in yellow, and lights will beam into the sky from Bondi Pavilion.

The premier has said NSW will hold a state-led royal commission into the attack.

“We need to have an independent investigation,” Minns said on Channel Seven’s Sunrise on Sunday.

“I’ve got bits and pieces of the jigsaw puzzle. We know parts of why this occurred on Sunday but until we have the full picture, and I can explain that to the people of NSW, well, our job’s not done.”

He said the terms of reference for the royal commission have not yet been drafted.

“I’m not going to draft them until I speak to leaders of the Jewish community who’ve been burying their dead this week.”

Bondi Beach incident helplines:Bondi Beach Victim Services on 1800 411 822Bondi Beach Public Information & Enquiry Centre on 1800 227 228NSW Mental Health Line on 1800 011 511​​ or Lifeline on 13 11 14Kids Helpline on 1800 55 1800 or chat online at kidshelpline.com.au

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