Greek authorities seek answers after six killed in Athens apartment block explosion

Emergency personnel search for survivors in the rubble of a building that partially collapsed following an explosion in the Plaka neighbourhood. Photograph: Stelios Misinas/Reuters

Greek authorities say they are trying to discover what caused a two-storey apartment block in the heart of ancient Athens to collapse “in a matter of seconds”, killing six people.

Emergency teams found the victims, including four American tourists, on Saturday, more than 24 hours after the early morning explosion in the historic Plaka district.