There has been no comment on Isis' official propaganda channels on the incident in Melbourne, with recent posts from the group concentrating on fighting around the Syrian-Iraqi border.

Police have not yet given any information on the suspects or confirmed whether the incident is terror-related.

But it comes after a series of vehicle attacks across Europe and the US, which have been carried out by jihadis inspired by Isis propagnda

The terrorist group has been intensifying its calls for supporters to launch attacks in their home countries as it becomes harder for them to travel to its dwindling territories in Syria and Iraq.

The group has not claimed several attacks carried out by jihadis inspired by its propaganda, including the New York bombing.