Greece is investigating a report of a possible explosion over the Aegean Sea, The Wall Street Journal reported, as authorities try to determine what happened to an EgyptAir plane that went missing early Thursday morning. The crew of a merchant ship said they saw what looked like "an explosion that lit up the sky" about 130 miles east of Karpathos, the report said. Greek navy teams are in that area as part of an international search for Flight MS804, which vanished from radar en route from Paris to Cairo with 66 people on board.
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