The Delhi Development Authority (DDA)will collaborate with IIT-Delhi to inspect Triveni Apartments in Dwarka, which likely begins on Thursday to identify the cause of a recent ''explosion-like'' sound heard at the building, officials said.

''Acting swiftly to ascertain the cause of the incident, IIT Delhi has been engaged and the consultancy fee for inspection has been paid. They are expected to visit soon,'' the DDA said in a statement.

Residents of the apartment building at Dwarka Sector 16-B, however, expressed concern over the lack of immediate remedial action. They reported hearing an ''explosion-like'' sound on October 7.

A sudden uplift of the lower basement slab in a non-tower area, caused by a combination of accumulated gases and increased groundwater pressure, resulted in the

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