Dhaka, Sept. 10 -- The four-strong probe panel formed in the aftermath of the incident on Sunday made the disclosure following its first meeting on Tuesday.

The committee, led by the polling regulator's Additional Secretary Mokhlesur Rahman, were given three working days to present its findings to the EC.

"All the members of the committee sat down for a meeting today (Tuesday). We will sit again tomorrow. We will submit our report to the EC on Thursday," said Mokhlesur.

EC officials believe the fire in the basement of the 12-storey office bloc was sparked by an electrical short-circuit.

Asked about the cause of the fire, Mokhlesur said, "It's not possible to say anything now. All details will be revealed once the work of the committee...