Hong Kong, July 16 (DPA) An Indonesian maid arrested after mixing her menstrual blood in a pot of vegetables she was cooking for her Hong Kong employer has walked free from court, a media report said Thursday.

Indra Ningsih, 26, admitted to police she had added the blood to the meal in a superstitious effort to make her Chinese employer 'more amiable and less picky' towards her.

She was originally charged with administering a poison or other noxious substance with an intent to injure in April.

However, a report in the Hong Kong Standard newspaper said prosecutors had decided the charge could not be sustained, after the government laboratory and doctors ruled that menstrual blood is not toxic.

Following a police investigation, a Department of Justice spokesman said it would be inappropriate to prosecute and dropped the charge.

Ningsih was arrested in April after her employer peered through the kitchen door and saw her acting suspiciously as she cooked vegetables at her home in the city's Tsueng Kwan O district.

When the employer checked, she found a blood clot-like substance mixed with the vegetables and a used sanitary napkin in the kitchen bin, according to a report in the Hong Kong Standard newspaper.