A suspected gas leak caused an explosions that leveled a residential building in Athens' Plaka district near the Acropolis, killing four American tourists and two residents.
https://www.foxnews.com/world/four-american-tourists-among-6-killed-explosion-levels-building-near-athens-acropolis
https://www.foxnews.com/world/four-american-tourists-among-6-killed-explosion-levels-building-near-athens-acropolis