The Indian industrial giant was supposed to submit the report by the end of March. Sources in the Tata Group said the submission of the report is being delayed as they are making some corrections in their investment proposal.

"We want to submit the report so that the government can find it reasonable and reconsider its position," a Tata official involved in the negotiation said.

Meanwhile, the government negotiators ruled out any possibility of signing an agreement with the Tata Group agreeing to a lower rate of gas price.

"We must not agree to gas price which is less than the base price. They [Tata] must propose a price higher than $2.35 for per thousand cubic feet (MCF) to initiate further negotiation," a top negotiatior said preferring anonymity.

He said the Indian group will have to give additional amount of money if it wants a guarantee for uninterrupted supply of gas.

Earlier, the second-phase of the fourth round negotiations on February 6 and 7 had ended with disagreements between the two parties on several issues.

Tata on April 20 last year formally submitted the $2.5 billion investment proposal for setting up a 1000 MW power plant, a steel mill with an annual production capacity of 420,000 tonne and a one million-tonne capacity fertiliser unit in Bangladesh..

On May 9, they agreed to start formal negotiations on May 25 and wind it up by August 31 to clear the way for signing of the investment agreement before November 30. But they had to review their set dateline due to complications in the process.