France extends curfews nationwide as 2,500 remain in custody after riots

French authorities extended overnight curfews in Paris and other major cities, saying the measures would remain in place for as long as necessary after a calm night, the prime minister said. The curfews follow the country's largest riots in years. More than 2,500 people remain in custody, and those arrested face expedited trials. Student unions and yellow vest groups plan new protests for Saturday.