Calcutta, March 3: Three persons were injured early on Sunday when a section of a flyover in north Calcutta collapsed together with a lorry using it, according to ABP Ananda TV.
The flyover, completed 26 months ago, was built to enable traffic to and from the airport bypass the congested Ultadanga crossing by linking Eastern Metropolitan Bypass and VIP Road.
Residents of nearby slums were woken up the sound of the crash before dawn Sunday, around 4.30am.
Police and personnel of the Disaster Management Group, Fire Services and Civil Defence reached the spot and began rescue operations after four hours.
The injured -- the driver of the lorry and his two helpers -- were rescued by locals.
Divers were called in to search the canal under the flyover for possible victims.
The flyover is heavily used during the day and till late at night.
ABP Ananda TV said that its cameras had spotted cracks in the same structure in December 2011, following which the authorities had carried out inspections.
ABP Ananda TV said that while the bridge was built during the Left Front government, the inspections and subsequent maintenance activities were done by the Trinamul Congress government now in power.
Experts quoted by The TV channel said there could be many causes for the collapse, from faulty design to faulty implementation, poor quality of materials and lack of maintenance.