Police have launched an investigation in South Korea after a doctor performed an abortion by mistake.

Axar.az reports citing CNN that a pregnant patient with a 6-week-old fetus had gone to a clinic in the district of Gangseo, in the country’s capital Seoul, according to the Gangseo police. At the clinic, a mix-up in medical charts and failure to check her identity led to the mistaken abortion.

The doctor and nurse in charge are under investigation, and the case will soon be sent to the prosecutor’s office, police mentioned.

“The doctor and nurse have acknowledged their fault,” a police official said. They are now being accused of negligence resulting in bodily harm.

The patient was supposed to receive a nutritional shot at the clinic. The nurse had allegedly injected her with anesthesia without confirming her identity, and the doctor had performed the abortion without checking her identity either, Yonhap reported. The patient had been unaware of the procedure.

An estimated 50,000 abortions were carried out in South Korea last year, according to the country’s Health Ministry. Actual numbers may be much higher since the criminalization of the practice distorted reporting of it.