India's parliament is set to close without resolving deadlock which has paralysed it for days.
The impasse has been caused by an uproar over alleged corruption in the allocation of coalfield concessions.
The opposition BJP wants the government to cancel the awards and hold an independent probe.
Earlier this week, police raided companies which allegedly misrepresented facts prior to being awarded coalfield concessions.
State auditors say India lost $33bn (£20bn) awarding coalfields at below market rates in the years up to 2009.
The auditors' report does not mention Prime Minister Manmohan Singh, but BJP leaders say he must step down because he had direct responsibility for the coal ministry when most of the awards were made.
Mr Singh denies any wrongdoing and has refused to resign.
Parliament has been deadlocked for 12 of the 20 days of the monsoon session and will conclude today without much business being done.
Some 30 bills were due to be considered and passed during the session.
These include a key bill which seeks to help two of the most disadvantaged groups in society by introducing quotas for government jobs.
The bill to amend the constitution to give the groups - known in India as backward scheduled castes and scheduled tribes - priority when it comes to promotion was tabled on Wednesday, but has been stalled ever since.
"This is a bigger scam, each minute of parliament costs the government a lot of money and we haven't worked at all," Information and Broadcasting Minister Ambika Soni was quoted as telling reporters.