border with lebanon. our correspondentjoe inwood has been monitoring the latest developments. for the people of gaza, there is no respite. this was once a residential block reduced to rubble. multiple generations of families are said to have been killed, seemingly caught unawares. translation: we were having dinner, when suddenly the bombing started - without any warning. in an instant, our house collapsed. the victims were taken to the nearby alaqsa hospital. in a population as young as this, children are so often the victims. this incident already has one of the highest single death tolls since this war began and it is expected to rise. the hamas run health authorities say more than 20,000 people have now been killed in gaza since israel launched its offensive. israel maintains it tries to avoid civilian casualties, it blames hamas for hiding among the population. the idf released new footage showing what it says are tunnels under the strip used for military purposes.