Arsonists extensively damaged a Melbourne synagogue on Friday in what Australia’s prime minister condemned as an antisemitic attack.

A witness who had come to Adass Israel Synagogue to pray saw two masked people spreading an accelerant inside the building at 4:10 a.m., Victoria Police Detective Inspector Chris Murray said.

About 60 firefighters with 17 fire trucks responded to the blaze, which Murray said caused extensive damage.

Investigators have yet to identify a motive, but Prime Minister Anthony Albanese blamed antisemitism.

“This is an outrage. The violence and intimidation and destruction at a place of worship is something that we should never see in Australia,” Albanese told Australian Broadcasting Corp.

“I think an attack on a synagogue is an act of antisemitism by definition,” Albanese added.

Religious leader Rabbi Gabi Kaltmann described the arsonists as “thugs.”

“Tonight is the Sabbath. We must all go and find a sense of calmness, comradery and community by gathering for the sabbath tonight and praying together as one community,” Klatmann told reporters outside the synagogue.

Attacks against Jews and Muslims have increased in Australia since Israel declared war on Hamas last year.

The government has appointed special envoys to combat antisemitism and Islamophobia in the community.

The Jewish envoy, Jillian Segal, a Sydney lawyer and business executive, said the Jewish community in Australia was “feeling evermore rattled by what is going on.”

“I'm very concerned. Here is one major escalation in terms of burning synagogues which has resonance as to what happened during the Holocaust,” Segal said.

Victoria state Premier Jacinta Allan noted in a statement that the synagogue was “built by Holocaust survivors.”

Many of the synagogue's original worshippers were post-World War II immigrants from Hungary.

Allan offered 100,000 Australian dollars ($64,300) to help repair the synagogue and said there would be an increased police presence in the area.

“Every available resource will be deployed to find these criminals who tried to tear a community apart,” Allan said.

“We stand against antisemitism now and forever,” she added.

Israel's Ambassador to Australia Amir Maimon noted that dozens of pro-Palestinian activists staged a three-hour protest outside The Great Synagogue in downtown Sydney on Wednesday, demanding sanctions against Israel. Worshippers were prevented from leaving the synagogue during the demonstration.

“We are talking about the values you expect Australians to follow, not my own values. And for me it’s clear that everyone should have the right to worship his own religion, own beliefs, as long as they also respect others,” Maimon said.

Daniel Aghion, president of the Executive Council of Australian Jewry, said the broader Australian community needed to condemn the arson attack.

“I've been getting phone calls this morning from the Hindu community, from other people, from good people who are prepared to stand up and that's my message for this morning to Australia, to the good people of Australia,” Aghion told reporters.

“Don't leave the Jewish people behind. Don't isolate us. Don't leave us exposed to the risk of attacks upon our religious institutions, our communal institutions. Stand with us. Stand against this hate. And stand against this kind of horrendous attack which should not occur on Australian soil,” he added.

Rabbi Gabi Kaltmann speaks to the media at the scene of a fire at Adass Israel Synagogue in the suburb of Ripponlea, Melbourne, Australia, Friday, Dec. 6, 2024. (Con Chronis/AAP Image via AP)

Australian leader blames antisemitism for arson that extensively damaged a Melbourne synagogue