A small army of ambulances remains at the site of today's terror attack in Barcelona.

At least 13 people are dead and another 80 have already been taken to hospital.

READ MORE: Live: Isis claim responsibility for Barcelona attack

The Spanish city's popular Las Ramblas district was packed with tourists when a white van sped through, bowling pedestrians on both sides of the street.

Jim Kent from Barcelona FM told Mike Hosking he wouldn't be surprised if the death toll rises.

"Las Ramblas is 900 metres long. At that time of night it would have 50,000 people walking up and down it, mostly tourists."

LISTEN ABOVE AS JIM KENT SPEAKS WITH MIKE HOSKING