In his letter, Pradhan said that migrant workers in Odisha who have urged that train services be started from Odisha so that they can reach their workplace.
Seven states -- Kerala, Andhra Pradesh, Karnataka, Tamil Nadu, West Bengal, Gujarat and Jammu and Kashmir have requested for 63 Shramik trains.
The issue came to light when a volunteer citizen movement, Whitefield Rising, tweeted about it, tagging top railway officials and the City Police Commissioner last night.
The woman, identified as Meena Kumbhar of Thodibahal in Balangir district, was travelling in the Balangir-bound 'Shramik Special' train from Lingampali in Telangana.
Its spokesperson Shahnawaz Hussain cited details of postmortem reports and comments of some of the deceased's family members to claim that they suffered from pre-existing conditions.
The last trains to run from any of the five stations in Delhi was on May 31, when three trains were operated: Anand Vihar- Purnia, Anand Vihar- Bhagalpur, Hazrat Nizamuddin-Mahoba.
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Singhvi said that according to an analysis, of the 3,740 trains that ran since May 1 about 40 per cent were recorded as late with an average delay of 8 hours.
Nine passengers, including a child, have been reported dead on 'Shramik Special' trains since Monday.
Over 5 lakh migrants are believed to have left by road from Maharashtra while another five lakh are awaiting their turn to return.
The student had returned on May 24 and was placed under institutional quarantine.
The bodies were found by railway staff when other passengers had got off the train and it was shifted to the yard for cleaning and sanitising.
The state's infrastructure is "stretched to its limit" following the devastation caused by Cyclone Amphan, she said.
Mohamed Irshad, 4, a resident of Chanpatia in Bettiah, also died in the special train while returning from Ahmadabad to Sitamarhi.
However, they were soon nabbed by railway protection force (RPF) and local police. All of them hail from Bargarh, Nuapada and Balangir districts.
Another migrant woman delivers a baby girl at Jharsuguda railway station