22 March 2019, Hessen, Birkenau: Firefighters are standing in front of the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Firefighters are standing in the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Rescue workers from the fire brigade and THW are standing at the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

dpatop - 22 March 2019, Hessen, Birkenau: Rescue workers from the fire brigade and the technical relief organization (THW) are standing in front of the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: A firefighter walks in the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Firefighters are recovering a charred gas bottle from the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Firefighters are recovering a charred gas bottle from the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Rescue workers from the fire brigade and the technical relief organization (THW) are standing in front of the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Rescue workers from the fire brigade and the technical relief organization (THW) are standing in front of the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Rescue workers from the fire brigade and the technical relief organization (THW) are standing in front of the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Firefighters are standing at the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Rescue workers of the technical relief organization (THW) are standing on the balcony of a house which had been severely damaged by the explosion of a neighbouring house. A house had exploded here in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Firefighters are standing in the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Firefighters are standing in the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Firefighters recover a gas cylinder from the rubble of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa

22 March 2019, Hessen, Birkenau: Rescue workers from the fire brigade and the technical relief organization (THW) are standing in front of the ruins of a residential building in a district of Birkenau in southern Hesse. The house had exploded in the morning and was destroyed to the ground. Other houses in the neighbourhood were severely damaged by flying debris. The occupant of the house is currently still missing. The house was to be put up for forced sale. Photo: Boris Roessler/dpa