He sought more time from the investigating agency. The TMC MLA was summoned by the CBI on June 8. He had earlier confirmed that he would appear for questioning on Saturday.
But today his lawyer came to the CBI office at Nizam Palace in the city and submitted a letter from Ahmed where he requested some more time from the CBI.
"He is very ill and as the Ramzan month is going on, he asked for more time from CBI. Once he is fit he will come for questioning", his lawyer said.
The CBI officials said that they have received Mr Ahmed's letter but declined to comment on the matter.
The sting tapes were released to various media organisations ahead of the 2016 West Bengal Assembly polls.
A division bench of the High Court noted that a report of the Central Forensic Science Laboratory (CFSL), Chandigarh had said the tapes were not tampered with.