Hoax bombs disrupted at least 30 flights across Europe on Thursday, following similar threats that affected seven flights and a cruise ship earlier this week. Investigators have not identified those responsible, although experts say the incidents fit methods often associated with state-sponsored hybrid threats.

Hoax bombs disrupted at least 30 flights across Europe on Thursday, following similar threats that affected seven flights and a cruise ship earlier this week. Investigators have not identified those responsible, although experts say the incidents fit methods often associated with state-sponsored hybrid threats.