A four-storey apartment block collapses in Athens prompt a continuing search and rescue operation, local media and emergency services report. Greek fire brigade crews respond to the incident in the Petralona area of the city on Tuesday. Authorities initially report that people may be trapped under debris. Rescuers locate four people who were earlier reported trapped and say they are safe. Emergency services remain on site as the operation continues in case anyone else is injured or still trapped in the rubble. Fire brigade personnel use rescue dogs to search through the debris, while other responders assess the area and work to remove rubble. Video shown by local outlets depicts workers moving through the collapsed structure searching for signs of life. Officials do not indicate the cause of the collapse in the available reports, and the search remains active as rescuers check for additional victims.