Rescuers continued clearing rubble from the scene of Thursday's accident. Some 67 people have been pulled out alive, but rescuers doubted more survivors would be found.
"There is no possibility of finding any person alive," S.S. Guleria, deputy inspector general of the India's National Disaster Response Force said Friday.
Three arrested employees of Hyderabad-based IVRCL Infrastructure Co. were to appear Saturday in court where arguments for formal charges would be heard, a police officer said on condition of anonymity as he was not authorized to talk to reporters.
Seven other employees have been detained, according to the Press Trust of India news agency. Police also sealed the company's Kolkata office.
The employees are being questioned over possible charges of murder and culpable homicide, crimes that are punishable by death or life imprisonment, and criminal breach of trust, which carries a prison sentence of up to seven years, police said.
IVRCL Infrastructure was contracted in 2007 to build the overpass, a project expected to take two years. But construction was far behind schedule.
The overpass had spanned nearly the width of the street and was designed to ease traffic through the densely crowded Bara Bazaar neighborhood. The structure fell within hours of concrete being poured into a framework of steel girders on Thursday.
"We completed nearly 70 percent of the construction work without any mishap," IVRCL official K.P Rao said Thursday. He was not among those detained on Friday. "We have to go into the details to find out whether the collapse was due to any technical or quality issue."
Two West Bengal state engineers overseeing the construction of the overpass were suspended from jobs pending an inquiry into the disaster, a state government statement said.
Prime Minister Narendra Modi, who was in Washington at the time of the collapse, said he was "shocked and saddened," according to a message on his Twitter account.
(AP)
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 in the capital of the east Indian
state of West Bengal. About 100 meters (300 feet) of the overpass fell,
while other sections remained standing.
