Al-Qaeda has threatened French satirical weekly Charlie Hebdo with a repeat of a 2015 massacre of its staff, after it republished controversial cartoons of the Prophet Mohammed, the SITE observatory said on Friday. Al-Qaeda in its publication One Ummah had warned that Charlie Hebdo would be mistaken it believed the 2015 attack was a "one off", after the magazine printed the "contemptible caricatures" in a defiant issue that marked the start of the trial in Paris of suspected accomplices in the attack. sjw/ach