PHOTOS: Deadly highway overpass collapse in India

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Thursday, March 31, 2016
Rescue workers cut through parts of a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
Rescue workers clear the rubbles of a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
Indian soldiers and rescue workers work on a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
Locals and rescue workers clear the rubble of a partially collapsed overpass as they look for survivors in Kolkata, India, Thursday, March 31, 2016.
Locals and rescue workers clear the rubbles of a partially collapsed overpass in Kolkata, Thursday, March 31, 2016.
Rescue workers take an injured man for medical treatment after retrieving him from underneath a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
Locals and rescue workers clear the rubbles of a partially collapsed overpass in Kolkata, Thursday, March 31, 2016.
Indian soldiers and rescue workers work on a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
Locals and rescue workers clear the rubbles of a partially collapsed overpass in Kolkata, Thursday, March 31, 2016.
Locals and rescue workers clear the rubbles of a partially collapsed overpass in Kolkata, Thursday, March 31, 2016.
Indian rescue workers work on a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
Rescue workers work at the site of a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
Indian rescue workers look at the mangled remains of vehicles buried under a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
Rescue workers clear the rubbles of a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
Indian rescue workers work on a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
Locals and rescue workers look for survivors from damaged vehicles under the rubbles of a partially collapsed overpass in Kolkata, India, Thursday, March 31, 2016.
Rescue workers work at the site of a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
An Indian soldier looks for survivors under a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
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Rescue workers cut through parts of a partially collapsed overpass in Kolkata, India,Thursday, March 31, 2016.
AP Photo/Bikas Das

KOLKATA, India -- A long section of a road overpass under construction collapsed Thursday in a crowded Kolkata neighborhood, with tons of concrete and steel slamming into midday traffic, leaving at least 21 people dead and scores of others injured in the Indian city, police said.