Police in the northern city of Hai Phong are looking for a police officer who has disappeared after a local couple filed a complaint that he had impregnated their 15-year-old daughter.
The family said the commune deputy chief officer is a distant relative who often asked the girl over to his house to babysit his two children.
They said he had sex with her repeatedly during that time. It is not clear if she was forced or threatened into it.
She is now seven months pregnant.
The police said they have assigned criminal officers to the case and are looking for the officer, identified only as D.
D. asked for medical leave last week and his family said he left several days ago and has not called home.
Having sex with a child under 16 carries a term of up to five years in jail, and five more years if the act is repeated or makes her pregnant.
The man faces death in case of rape.