Two persons were injured when a huge concrete slab of an under-construction flyover fell on Gurugram's Sohna road on Saturday night, police said.
The injured, said to be labourers, were hospitalised, they added.
The area was cordoned off, a police official said.
Haryana Deputy Chief Minister Dushyant Chautala said a team of the National Highways Authority of India (NHAI), the sub-divisional magistrate of the area and a civil defence team were at the site.
"Slab of elevated corridor Sohna rd (road) Gurugram collapsed. There have been 2 injuries and both have been admitted and (are) under treatment," he said in a tweet.
Locals told the police that they heard a loud sound when the concrete slab fell on the road.
They said a major accident was averted as there were not too many people at the site when the incident occurred.
Preliminary reports suggested that a few girders installed between two pillars fell all of a sudden, leading to the incident.