Devastating photographs show the extent of the Kolkata flyover collapse and rescue efforts

Indian rescue workers and volunteers try to free people trapped under the wreckage of a collapsed flyover in Kolkata on the night of March 31, 2016.

Around 25 people were killed and over 100 injured after an under-construction flyover collapsed in north Kolkata in eastern India yesterday afternoon.

Located in a congested area, the bridge collapsed on pedestrians and vehicles. Rescue operations by the Indian army and disaster response forces continued through the night. Cranes, saws and jack hammers were used to search for people who may still be trapped under the debris.

A governmental probe will look into the cause of the disaster. The 2.2 km-long bridge had been under construction since 2009, but had faced repeated delays, with approximately 45% work still pending. It's builder, a private company called IVRCL, called the collapse an 'act of God'.

IMAGE: AP PHOTO

Rescue workers cut through parts of a partially collapsed overpass in Kolkata, India, on March 31, 2016.

Rescue workers clear the rubbles of a partially collapsed overpass in Kolkata.IMAGE: AP PHOTO/BIKAS DAS

An Indian soldier looks for survivors under a partially collapsed overpass in Kolkata.IMAGE: AP PHOTO/BIKAS DAS

Indian Army rescuers working on site in the collapse of a flyover in Kolkata.IMAGE: RONALD PATRICK/NURPHOTO/CORBIS IMAGES

Indian Army rescuers working on site in the collapse of an flyover under construction in Kolkata.IMAGE: RONALD PATRICK/NURPHOTO/CORBIS IMAGES

General view shows a partially collapsed overpass in Kolkata after rescue operations, on April 1, 2016.IMAGE: AP PHOTO/BIKAS DAS

Excavator machines remove debris of a partially collapsed overpass in Kolkata, India, Friday, April 1, 2016. The overpass spanned nearly the width of the street and was designed to ease traffic through the densely crowded Bara Bazaar neighborhood.IMAGE: AP PHOTO/BIKAS DAS

IMAGE: AP PHOTO/BIKAS DAS