Dutt, whose conviction in 1993 Mumbai blasts case was upheld by the Supreme Court in March this year, surrendered before the TADA court here yesterday.
"The 'anda' (egg-shaped) cell does not have enough light and Dutt felt suffocated due to insufficient ventilation," his lawyer Rizwan Merchant told the TADA court this morning.
Merchant further said that the egg-shaped cell was generally used to keep the hardened criminals or those arrested on terrorism-related charges. Dutt, he said, was not convicted under TADA, and was not a terrorist.
Judge G A Sanap asked him to file a written application so that he could pass an order after hearing the prosecution.
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Merchant later told reporters that he will seek instructions from Dutt; if the actor was shifted to Pune's Yerwada prison, he need not file the application.
A Jail official, meanwhile, said 53-year-old Dutt spent the night restless, reading religious books. He did some exercises in the morning.
Dutt has got permission to carry with him Bhagwat Gita, Ramayan and Hanuman Chalisa.
Another officer told PTI that prison department was gathering information such as number of convicts, security conditions and presence of inmates linked to underworld at jails in Taloja (Navi Mumbai), Yerwada (Pune), Thane, Nagpur and Nashik.