An official said the victim, Mangal Singh, was admitted to the hospital on Monday over complaint of breathlessness, and that he was immediately operated upon.
The family members of the victim, however, alleged that Mangal continued to feel uneasy after the operation. The doctor then told them that the patient required oxygen.
They said by the time the oxygen cylinder arrived, Mangal had breathed his last.
Following the orders of the Punjab government, Tejbir Singh, principal of the medical college, conducted an inquiry into the incident, the official said.
The patient died at around 7.00 pm on Tuesday, he added.
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