Bharatiya Janata Party president Rajnath Singh on Monday said the Janata Dal-Secular had betrayed the saffron party again in Karnataka and asserted that its decision to vote against the state government was a 'blot on democracy.'

Singh said the BJP will not surrender at any cost even if its government was on the verge of collapse.

"The JD-S had promised us unconditional support. We are ready to go to the people and face elections," he said.

Any decision on Chief Minister B S Yeddyrurappa's resignation will be taken by the BJP's state unit. Party leader Yashwant Sinha is already camping in Bangalore.

"It was not our initiative. It was JD-S who came to us to form the government," he said.

Singh said the developments in Karnataka were the worst form of coalition politics.