Congress on Saturday attacked Gujarat Chief Minister Narendra Modi for his fast accusing him of "wasting" public money through his "drama" and said National Democratic Alliance would collapse if Modi was projected Bharatiya Janata Party's prime ministerial candidate.

The party also said Modi wanted to wash away the "stains" of his past "crimes" through this fast. "Narendra Modi and BJP have been interpreting the Supreme Court order (on Gulberg Societ riot case) as a victory. And hence it seems Modi is celebrating his victory by splurging the hard-earned money of 6 crore Gujaratis," All India Congress Committee general secretary in-charge for Gujarat Mohan Prakash told PTI.

Accusing Modi of "polluting even the concept of fast", Prakash said "a fast is always done individually and in a simple manner. It is done generally done for penance. Modi is polluting even fast. He is celebrating his victory through this drama of fast."

Congress spokesperson Rashid Alvi said it appeared Modi had realised "the crimes he committed in the past" and hence "wanted to wash away the stains of his crime by fasting. But the stains of not all crimes are washed away in this manner."

Alvi said that the NDA will collapse if Modi was projected BJP's prime minsterial candidate.

"If Modi is projected as Prime Ministerial candidate, it will be difficult for NDA to keep its flock together. NDA will break that way. Bihar Chief Miniser Nitish Kumar did not allow Modi to come to Bihar during elections and was even ready to break from the alliance on the issue. Even an ally of NDA is ready to tolerate Modi," he said.

Mohan Prakash said nobody becomes a prime minister on the basis of any certificate by a foreign country or by a few industrialists involved in the "loot" of people's money in Gujarat.