A Somali-born man set fire to a pickup truck laden with gas cylinders in the center of the Australian city of Melbourne on Friday and stabbed 3 people, killing 1, before he was shot by police in a rampage they called an act of terrorism.
Islamic State claimed responsibility for the attack, without providing any evidence.
The utility truck carrying barbecue gas cylinders burned on busy Bourke Street just before the evening rush hour as the driver stabbed bystanders and attacked police.
The cylinders didn't explode and the fire was put out in 10 minutes, by that point the attack was over.
"We're still trying to piece together whether the vehicle was lit then he got out the car or whether he got out the car and then the vehicle took flame," Victoria Police Commissioner Graham Ashton told reporters.
Video posted to Twitter and broadcast on TV showed the man swinging a knife at 2 police officers, while his truck burned in the background.
One of the officers shot the man and he collapsed to the ground clutching his chest, the video showed. Other footage showed 2 stab victims lying on the ground nearby.
The attacker died in hospital, as did one of the victims, Ashton said. "From what we know of that individual, we're treating this as a terrorism incident," he said of the attacker