IS Claims Attack after Australia Knifeman Kills 1, Hurts 2

Police said a Somali immigrant killed one person and wounded two others in a rush-hour stabbing spree in the heart of Australia's second city Friday, labelling it a terrorist attack.

The unnamed man drove a 4X4 truck loaded with gas bottles into the bustling city centre of Melbourne, ignited the vehicle in a ball of flames and then attacked passers-by with a knife, police said.

He stabbed three people before being confronted by armed officers who eventually shot him in the chest. One victim died at the scene and the attacker died later in hospital.

Counter-terrorism police and intelligence officers are still piecing together how the incident occurred, but said the attacker was known to intelligence services.

The group Islamic State -- which often claims responsibility for such attacks -- said via its propaganda arm that the perpetrator was an "Islamic State fighter and carried out the operation."

Witness footage showed police struggling for at least a minute to corral the towering man -- who was wearing a dark tunic -- as he lunged, slashed and stabbed wildly at two officers.

At least two members of the public bravely stepped in to help police. One man was armed with a cafe chair while another -- swiftly dubbed an "Aussie hero" on social media -- repeatedly tried to ram the suspect with an empty metal shopping cart.

But the attacks continued unabated before one officer opted for lethal force, shooting the suspect in the chest.

"We are now treating this as a terrorism event," said Victoria Police Chief Commissioner Graham Ashton, who said the suspect was "someone that is known" to police through family connections.

The unnamed assailant was said to reside in Melbourne's northwestern suburbs, but had come to Australia from Somalia in or around the 1990s, when the country was ravaged by a civil war.

Witness Chris Newport, 60, described how he first heard a loud noise and saw a truck on fire, rolling across the tram tracks before a second, louder bang.

"He was holding a knife and running around the place," he said of the attacker.

"Someone had a shopping trolley and was trying to stop him. Two police turned up really quickly, but there was only a couple of them. He started to go at them and there was a loud bang -- they shot him," he told AFP.

- Double blow for city -

The authorities will face inevitable questions about how someone known to the intelligence services nonetheless managed to carry out an attack.

Officers said they "are not looking for anyone further at this early stage" and there was no immediate evidence of an ongoing threat related to the attack.

The injured police officers are being treated for cuts and scrapes and are not thought to be in a serious condition.

Forensic investigators combed through the scene late Friday, where the dead victim's body lay covered in a white plastic sheet.

A three-block-wide exclusion zone has been set up by police.

Melbourne is Australia's second largest city, a cosmopolitan metropolis of almost five million people famed for its cafes, bars, restaurants and high standard of living.

Friday's attack is a double blow for the city as it coincides with an ongoing murder trial of 28-year-old James Gargasoulas, accused of ploughing his car into crowds in the same area in 2017, killing six people.

But the situation away from the immediate crime scene quickly returned to normal.

State Premier Daniel Andrews described the attack as "evil" but said the city would not be bowed.

British Prime Minister Theresa May offered her support to the country.

"My thoughts are with the people of Melbourne and all of Australia following today's appalling attack. We stand with you against terror," she tweeted.

Government sources say Australia has been the target of around a dozen terror plots in recent years. Few have been successful, sophisticated or caused mass casualties, but this latest attack is likely to fuel the already heated debate over migration.