Kolkata bridge collapse leaves 20 dead, scores injured; rescuers use bare hands to free survivors. An immense rescue effort is underway in the Indian city of Kolkata after a road bridge under construction collapsed into traffic, killing at least 20 people and leaving nearly 100 others injured. A police complaint has already been filed against the construction company but it has denied responsibility for the incident, incensing the nation by describing the collapse as an act of God.