French police carrying out extra border checks

French police are carrying out extra border checks on people arriving from Spain as authorities search for a fugitive suspect in the Barcelona attacks.

No arrests had been made by Saturday morning, according to a French security official, who described the checks along the normally open border as routine whenever neighboring countries signal a potential risk.

Another French security official said Spanish authorities flagged a Kangoo utility vehicle believed to have been rented in Spain by a suspect in Thursday's attacks and that may have crossed the nearby border into France.

Both officials were not authorized to be publicly named.

At multiple border posts in the winding roads crossing the western Pyrenees on Saturday, gendarmes stopped certain vehicles to check drivers' IDs and the contents of their cars. They targeted primarily vans, trucks and utility vehicles.