Sydney residents have laid flowers and lit candles in a massive outpouring of support as the community mourns people who were massacred by two gunmen in a terror attack Sunday targeting the Jewish community celebrating the first night of Hannukah at Sydney’s famed Bondi Beach.

Australian leaders have promised to immediately overhaul already-tough gun control laws after a mass shooting targeted a Hanukkah celebration on Sydney’s Bondi Beach.

Two alleged gunmen who attacked a Hanukkah event at Sydney's Bondi Beach had travelled to the Philippines before the assault which killed 15 people and appeared to be inspired by Islamic State.

New South Wales Police said emergency services were called to Campbell Parade, the road that runs along Bondi Beach, just before 7 p.m. local time, to reports of a shooting.

A mass shooting in which 15 people were killed during a Hanukkah celebration at Sydney's Bondi Beach was "a terrorist attack inspired by Islamic State," Australia's police said Tuesday.

GoFundMe has launched a centralised hub of verified fundraisers for victims of the Bondi Beach mass shooting, Australia's deadliest such attack in 30 years. Sixteen people were killed in the shooting, including one of the two gunmen, while over 40 more were injured.

Video appeared to show the bystander, named as fruit shop owner Ahmed al Ahmed, tackling and disarming one of the gunmen on Sunday.

England and Australia players will wear black armbands and flags at Adelaide Oval will be flown at half-staff on Wednesday in an Ashes tribute to the victims of the Bondi beach shootings.