Multiple earthquakes are rattling Santorini, a volcanic island in Greece, prompting authorities to dispatch rescuers with tents, a sniffer dog and drones, and to shut schools on four islands. Residents have been warned to avoid indoor gatherings,

Hundreds of quakes have been registered in recent days in the Aegean Sea between Santorini and Amorgos, prompting authorities to shut schools and the islands of Ios, Amorgos and Anafi.