BARCELONA - The driver of the van that plowed into crowds in Barcelona, killing 13 people, may still be alive and at large, Spanish police said on Friday, denying earlier media reports that he had been shot dead in a Catalan seaside resort.
Josep Lluis Trapero, police chief in Spain's northeastern region of Catalonia, said he could not confirm the driver was one of five men killed.
"It is still a possibility but, unlike four hours ago, it is losing weight," he told regional TV.
The driver abandoned the van and fled on Thursday after speeding along a section of Las Ramblas, the most famous boulevard in Barcelona, leaving a trail of dead and injured among the crowds of tourists and local residents thronging the street.
It was the latest of a string of attacks across Europe in the past 13 months in which militants have used vehicles as weapons
It was the latest of a string of attacks across Europe in the past 13 months in which militants have used vehicles as weapons - a crude but deadly tactic that is near-impossible to prevent and has now killed nearly 130 people in France, Germany, Britain, Sweden and Spain.
Suspected jihadists have been behind the previous attacks.
Islamic State said the perpetrators of the latest one had been responding to its call to target countries involved in a US-led coalition against the Sunni militant group.
Hours after the van rampage, police shot dead five people in the Catalan resort of Cambrils, 120 km down the coast from Barcelona, after they drove their car at pedestrians and police officers.
The five assailants had an axe and knives in their car and wore fake explosive belts, police said. A single police officer shot four of the men, Trapero said.
A Spanish woman was killed in the Cambrils incident, while several other civilians and a police officer were injured.
Trapero had earlier said the investigation was focusing on a house in Alcanar, southwest of Barcelona, which was razed by an explosion shortly before midnight on Wednesday.
Police believe the house was being used to plan one or several large-scale attacks in Barcelona, possibly using a large number of butane gas canisters stored there.
However, the apparently accidental explosion at the house forced the conspirators to scale down their plans and to hurriedly carry out more "rudimentary" attacks, Trapero said.
Police have arrested four people in connection with the attacks - three Moroccans and a citizen of Spain's North African enclave of Melilla, Trapero said. They were aged between 21 and 34, and none had a history of terrorism-related activities.
Another three people have been identified but are still at large. Spanish media said two of them may have been killed by the blast in Alcanar while one man of Moroccan origin was still sought by the police.
Police in France are looking for the driver of a white Renault Kangoo van that may have been used by people involved in the Barcelona attack, a French police source told Reuters.