The manhunt to capture a suspect behind the deadly terror attack in Barcelona has been extended to Europe, Catalan officials have said. At least 13 people were killed when a van rammed into a crowd in popular tourist spot Las Ramblas, Barcelona, on 17 August.

Official Joaquim Forn was quoted by local media as saying that the van driver had been identified as Younes Abouyaaqoub,a 22-year-old from Morocco.

The announcement came one day after France said it had increased security on the border with Spain amid fears Abouyaaqoub could cross into the country.

Authorities fear Abouyaaqoub could take advantage of the passport-free Schengen Agreement – a treaty that abolished border checks in some European countries.

Forn explained that Abouyaaqoub seized the opportunity to flee during chaos and panic generated by the terror attack in Las Ramblas, Spanish newspaper El Pais said.

It is believed the suspect fled the scene on foot. Once he reached the centre of Barcelona and the University Zone – six kilometres away from the site of the attack – he is thought to have assaulted and stabbed Pau Perez to steal his car, a white Ford Focus.

Abouyaaqoub put the wounded Perez in the back of the car and began his escape, encountering several agents – who shot at him in the failed attempt to stop him – during his journey. Abouyaaqoub abandoned the Ford Focus five kilometres from Barcelona, in a car park where authorities found Perez, who later died of his wounds, becoming the 14th victim of the attack.

Forn said on Monday 21 August that there is no reason to believe that the suspect is outside Catalonia, but he added that Catalan forces had been collaborating with European authorities to search "in all European countries".

Abouyaaqoub is the presumed ringleader of a 12-strong terror cell police say also orchestrated a similar vehicle attack in Cambrils on the morning of 18 August. One person died in that attack.

Abouyaaqoub is believed to be the only person still lat large.

Authorities said the cell had been radicalised by Imam Abdelbaki Es Satty, who is believed to have died in an explosion at a house in Alcanar on 16 August.

Members of the cell were building explosive devices before the attack. Following the incident, they opted to use vehicles instead.

The cell is now believed to have been dismantled as four people are in custody, five were killed following the Cambrils attack and two people died in the 16 August explosion.

It has been revealed that Satty may have been radicalised while in prison, where he spent two years after being sentenced in 2012 for smuggling hashish between Morocco and Spain.

He was locked up alongside Rachid Aglif, who was in the middle of an 18-year sentence for his role in the 2004 Madrid train bombings, in which more than 190 people were killed and 2,000 injured.

The Isis terror group has claimed responsibility for the attacks in Spain. However, similar claims have followed previous attacks in Europe, with anti-terrorism experts arguing they are not reliable and could be just a propaganda tool.

IBTPOTY2017 Pictures of the week
17 August 2017: A person receives medical attention after a van ploughed into a crowd on the Ramblas in Barcelona, killing at least 13 people and injuring around 100 othersNicolas Carvalho/AFP