Argentine police in Buenos Aires are investigating Dr Leopoldo Luque over the treatment received by the soccer legend just before his death on Wednesday .Police in Buenos Aires were at the doctor's home and the clinic of Doctor Leopoldo Luque, also seized files in the process of investigating Maradona's death.

Detective officers in San Isidro, Buenos Aires province, said the investigation is “necessary” after interviewing Maradona’s relatives.

Meanwhile, Dr Luque told reporters on Sunday that he had the backing of his professional body, the Argentine Society of Neurosurgery.

“I know what I did. I know how I did it.... I am absolutely sure that what I did the best for Diego, the best I could.”

“I know what I did. I know how I did it.... I am absolutely sure that what I did the best for Diego, the best I could.”

"I had the full endorsement of the Argentine Society of Neurosurgery that Diego needed the surgery. Six doctors evaluated him. Death had nothing to do with [the surgery]."

Dr Luque added: "He was discharged after surgery.