A 22-year-old woman who had been in a coma for nine days after a cosmetic surgery procedure died Saturday, police in Busan said.

The college student only identified by her last name Kim received facial bone contouring surgery for more than five and a half hours on Oct. 7.

She was found unconscious by a nurse in the hospital’s recovery room that evening and immediately moved to a nearby general hospital.

Investigators said they found no wounds other than those from the cosmetic surgery. An investigation in under way to determine the exact cause of death, police said.

Along with double-jaw surgery, facial bone contouring surgery is one of the most popular, and potentially dangerous, operations Korean women undergo for a smoother facial line.

(monicasuk@heraldcorp.com)