What we know so far about attack on Hanukkah celebration in Sydney

• This is the deadliest attack in the country since the 1996 Port Arthur massacre prompted the then conservative government to enact strict gun control laws — and Australian Prime Minister Anthony Albanese pledged Monday to further strengthen legislation.

State of play: The attack in the New South Wales state capital that police believe was carried out by a father and son began around 6:45pm Sunday local time as about 1,000 people gathered at a "Chanukah by the Sea" event organized by the Chabad of Bondi.

• In addition to killing 15 people, state police said the gunmen injured more than 40 people and several remained in critical condition Tuesday, including two police officers, officials said at a briefing.
• Bystander Ahmed el Ahmed tackled a gunman and wrestled away his weapon, an act NSW Premier Chris Minns said made him a "genuine hero," saving "the lives of countless other people."
• NSW police fatally shot suspect Sajid Akram, 50, and his 24-year-old son, Naveed Akram, was hospitalized in critical condition.

The latest: Albanese said Tuesday it appears the attack was "motivated by Islamic State ideology."

• He told the Australian Broadcasting Corporation that officials interviewed Naveed Akram in 2019 during an investigation into associates, "but he was not seen at that time to be a person of interest."
• Albanese added: "Whether he was radicalized further after that, what the circumstances are, that's the subject of further investigation."

Zoom in: The ages of the victims who died ranged from 10 to 87 years old, police said.

• Chabad identified two of those killed as Holocaust survivor Alex Kleytman and Rabbi Eli Schlanger, a British-born assistant rabbi at Chabad of Bondi and an organizer of the event.
• Australia has the highest number of Holocaust survivors per capita outside Israel, according to the Conference on Jewish Material Claims Against Germany.

Zoom out: Video footage showed two gunmen in black shirts firing from a bridge.

• Authorities said they discovered two improvised explosive devices at the scene.

• The father had six firearms licensed to him, all of which have been recovered by police, New South Wales Police Commissioner Mal Lanyon said.

What they're saying: Albanese called it a "targeted attack on Jewish Australians on the first day of Hanukkah, which should be a day of joy."

• He added at a Sunday briefing: "The Jewish community are hurting today. Today, all Australians wrap our arms around them and say, 'We stand with you. We will do whatever is necessary to stamp out antisemitism.'"
• President Trump in a White House speech called the attack "purely antisemitic."
• U.S. Secretary of State Marco Rubio condemned the attack, saying on X that "antisemitism has no place in this world."

Between the lines: Mass shootings have been rare in Australia since semiautomatic weapons were banned in response to the Port Arthur massacre.

What's next: Per Albanese's post-national Cabinet meeting statement, police ministers and state attorneys general will weigh proposals including:

• Accelerating work on a national firearms register.
• Limiting the number of firearms an individual can hold.
• Limiting open-ended firearms licensing and the types of guns that are legal, including modifications.
• Ensuring only Australian citizens can hold firearms licenses.

More from Axios:

• N.Y., L.A. police bolster security during Hanukkah after Sydney attack
• Australia PM: Bondi Beach shooting "motivated by Islamic State ideology"

Editor's note: This story has been updated with additional information throughout.

Rebecca Falconer contributed reporting.