Rescuers have controlled through the night to reach dozens of people thought to be stuck under a distorted flyover in the Indian city of Calcutta.
The bypass was under structure in the Girish Park area when it collapsed suddenly on Thursday night.
At least 23 people were killed and scores were injured.
The 2km-long (1.2 mile) flyover had been under construction since 2009 and missed several deadlines for completion.
Officials said more than 90 people have been rescued, some of whom where in hospital in a critical condition.
“Many of the people rescued have been seriously injured,” police chief Ajay Tyagi told the Reuters news agency.
“Many could still be buried below the debris.”
The flyover is considered as one of the hectic parts of one of India’s busiest cities and all around are scenes that speak of the scale of the tragedy.