"Our investigation is heading in proper direction and by next week, we would be able to ascertain the exact cause of the fire," Mumbai's Chief Fire officer P S Rahangdale told PTI.
He, however, declined to give the exact date of submitting the much-awaited probe report.
"Currently, I am in the process of cross-examining the officers and executives who were part of the event. I have found many missing links during cross-examination and those I need to verified and corroborate before arriving at a definite conclusion," said Rahangdale.
"I wanted to wind up the investigation in two days, but the process of cross-examination is taking time, the Chief Fire Officer said.
A huge fire broke out on Sunday at Girgaum Chowpatty sea front during a cultural programme organised as part of the 'Make in India' expo, which concluded on February 18.
A day after the incident, a Fire Brigade official had said all aspects, including sabotage angle, will be investigated. No casualties were reported in the fire.