Bourke Street: Malcolm Turnbull calls for security improvements including bollards in Melbourne to prevent more attacks.

By political reporter Henry Belot.

Prime Minister Malcom Turnbull has called for more bollards to be installed in Melbourne to prevent a repeat of the Bourke Street attack that killed five people last week.

Mr Turnbull said the attack, which injured more than 30 pedestrians and has prompted a review of police conduct, was an example of a weakness in city planning that needed to urgently addressed.

“This is a very, very concerning vulnerability,” Mr Turnbull told Melbourne radio station 3AW.

“We need to be able to ensure — as much as we can — that it is not possible to get a vehicle into that place.”

Mr Turnbull said he had already discussed security improvements with Victorian Premier Daniel Andrews and Melbourne Lord Mayor Robert Doyle.

“We have been working effectively with state and other governments to ensure that places of mass gathering are hardened and I believe more work has to be done in that area in Melbourne,” he said.

“It’s a big open city with big streets, wide footpaths, and the attack in Bourke Street is an example of a vulnerability that we have to address.”

The Prime Minister said the Bourke Street attack was similar to attacks in Nice and Berlin last year, although terrorism has been ruled out in this case.

“It is a significant issue where you have a big mall like that where it is relatively easy to get a vehicle into a place where you have a large number of people,” he said.

“When you are looking at these pedestrian areas in cities, you need to have a very hard-headed think about how you make it harder to get a vehicle in there.

“Just one vehicle — it doesn’t have to be a truck — can do so much damage.”

Police were in pursuit of the vehicle before the driver drove erratically around an intersection before speeding down a footpath on Bourke Street and crashing into pedestrians.

The Victorian coroner is now investigating police conduct and the decision to call off the pursuit in the city.

In 2015, Victorian police officers became subject to new restrictions on conducting pursuits following 13 deaths in five years, but they have since been amended after the change sparked outrage from the Police Association and its members.

This post originally appeared on ABC News.