The FIR was registered against CMS Dr Keshav Swami and Dr Meraj after the patient, Vinay Kumar (45), died this morning, police said.
According to the aggrieved family members, Kumar was admitted to the district hospital on June 12 with burn injuries where the doctors asked them to arrange O(-) blood because it was not available with the hospital.
The family members alleged that when they managed O(-) blood, they staff said the blood required was 0(+).
Police are probing the matter but no arrests has been made in this connection so far.