NEW : At least five people are taken to a local hospital . NEW : Rescue efforts are under way to free trapped residents . The U.S. Geological Survey says the quake was centered about 35 miles (55 kilometers) northeast of Los Angeles. A railway passes through the neighborhood .
NEW : At least five people are taken to a local hospital . NEW : Rescue efforts are under way to free trapped residents . Kibera is one of Africa 's largest slums . A railway passes through the neighborhood .