The French government on Monday blamed massive ticket fraud and Liverpool’s handling of its fans for the crowd trouble which marred the club’s Champions League soccer final against Real Madrid in Paris at the weekend.

But as a blame-game over the fiasco continued into Monday, British prime minister Boris Johnson described the scenes outside the national stadium, which saw some fans including children tear-gassed by French police, as deeply upsetting.

Interior minister Gerald Darmanin said Liverpool had provided its supporters with paper tickets, and not electronic, which allowed for the possibility of what he described as a “massive fraud on an industrial scale”...