A total of 159 people are still unaccounted for after an oceanfront apartment building collapsed near Miami, killing at least four people. The search at the 12-storey Champlain Towers South building just a few miles north of the Florida city’s South Beach is taking a toll on relatives who can do little but hope that their loved ones will somehow be found alive. Scores of rescuers are using diggers, drones, microphones and their own bare hands to pick through the mountain of debris. Miami-Dade county mayor Daniella Levine Cava said there is still hope of finding survivors in the rubble more than 24 hours after the building collapsed.