"At least 15 died on the spot while 35 were admitted in a nearby hospital. The condition of some is critical."
The changes, if approved by parliament, will be the biggest economic reform since India opened its economy in 1991.
The project would create 90,000 jobs when fully complete in 2019.
20 of 64 ministers analysed on the basis of their own declarations face criminal charges, while 92 per cent of the ministers are multi-millionaires.