"The Sir Creek issue is a matter of great concern for the people of Gujarat. BJP demands answers to the questions raised by chief minister Narendra Modi. Certainly, no attempt should be made to give away any land of Sir Creek," BJP spokesperson Nirmala Sitharaman said.
She said it was only appropriate that the government takes into account the concerns of the people Gujarat.
The PMO had on Wednesday debunked Modi's concerns as "mischievous" and questioned its timing as it had come a day before first phase of polling in Gujarat.
Modi had in his letter said "I am writing to you at this juncture as I was told that a decision is being taken on Sir Creek issue on December 15".
Modi voiced his apprehension ahead of Pakistan interior minister Rehman Malik's visit to Delhi from December 14 to discuss a range of bilateral issues.
Sitharaman said that "due to the election code of conduct, Modi wrote the letter as a concerned citizen and not as a chief minister of a state."