KALAMATA, Greece—A fishing boat carrying migrants trying to reach Europe capsized and sank off Greece on Wednesday, authorities said, leaving at least 79 dead and many more missing in one of the worst disasters of its kind this year.
Coast guard, navy, and merchant vessels and aircraft fanned out for a vast search-and-rescue operation set to continue overnight. It was unclear how many passengers might still be in the water or trapped in the vessel, but some initial reports suggested hundreds of people may have been on board.
