The National Highway Authority of India (NHAI) Chairman Brijeshawar Singh said, "We have not found Gammon India and Hyundai guilty in the Chambal bridge collapse."
On the issue of blacklisting the companies he said that "We must follow a procedure based on proofs to blacklist."
Singh said, "There had been some technical reason behind the collapse which would come out only after the debris is removed and investigation completed."
The Chairman said two NHAI officials had been booked under section 304 (culpable homicide) and 308 (Attempt to commit culpable homicide) of IPC and added "we are also investigating the role of our officials."
He added that "the project would now be delayed for 9 to 12 months" and is expected to be completed by Dec 2011.
17 people are still missing after an under-construction bridge collapsed in Kota. Rescue and relief workers have recovered 32 bodies so far.