Police said Wednesday they suspect a local obstetrician injected his secret lover with a mixture of drugs that caused her death before abandoning her body.

The 45-year-old obstetrician, surnamed Kim, was arrested last week on charges of abandoning the body of the 30-year-old woman in a Seoul parking lot after she suddenly died from getting the shots, according to the Seocho Police Station.

The doctor allegedly called her to his clinic late at night on July 30 and injected a mixture of 13 kinds of drugs, including a glucose solution, a sedative and anesthetics.

"Experts say chances are high that injecting such drugs at the same time could cause death from difficulty in breathing," an officer in charge of the case said.

The doctor told police he gave her the drugs because the woman asked for them to help her sleep, adding she had been conscious for some 15 minutes after the injection, but suddenly died despite cardiopulmonary resuscitation.

Police, however, said they could not find any physical evidence of whether Kim intentionally killed the woman, with the autopsy results failing to spot the exact cause of her death.

"We will send the case to prosecution tomorrow with charges of abandoning her body along with charges not for murder but for professional negligence that resulted in death," the officer said, adding additional investigation is planned over his motives of the crime. (Yonhap)