People lay flowers to pay tribute to the victims of last year's terror attack at the Las Ramblas in Barcelona

A man lays flowers to pay tribute to the victims of last year's terror attack at the Las Ramblas in Barcelona

Municipal police officers lay a wreath to pay tribute to the victims of last year's terror attack at the Las Ramblas in Barcelona

Members of Civil Guard police (L) and National Police (R) arrive to lay a wreath as they pay tribute to the victims of last year's terror attack at the Las Ramblas in Barcelona