No loss of life has been reported in the blaze in the hospital, which was in the news last year after scores of infants died at the facility.
"Prima facie, it seems that the fire was caused by a short circuit," SP (North) Ganesh Saha said.
Six fire tenders took nearly an hour to control the flames which destroyed important documents in the record room.
The Baba Raghav Das Medical College had hit the headlines in August last year when 63 children, including infants, died within a span of four days when the supply of oxygen was allegedly disrupted due to non-payment of dues to the vendor.
The state government has, however, vehemently denied that shortage of oxygen led to the deaths.
An FIR against nine accused, including ex-principal Dr Rajiv Misra, his wife Dr Purnima Shukla and nodal officer Dr Kafeel Khan, was filed by director general medical education (DGME), K K Gupta in Hazratganj police station in Lucknow and police have filed a charge sheet against them. All the nine accused have been arrested.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)