A 24-year-old Indonesian maid was arrested on Saturday after allegedly mixing urine with water and serving it to her female employer in an apartment in the New Territories’ Tuen Mun.

The Indonesian woman worked for a husband and wife who have one-year-old twins and stay in an apartment at Palm Cove Tower on Castle Peak Road in Tuen Mun, Apple Daily reported.

The couple had been unhappy with the maid’s work and had scolded her. Later on Saturday, the maid handed a bottle of water to the wife, who had a sip and suspected urine had been added to the water bottle.

She called police and officers took the domestic worker back to the police station and charged her for allegedly administering poison with intent to injure. Officers from the Tuen Mun district crime squad investigated the case.

According to the Offenses Against the Person Ordinance, any person who unlawfully and maliciously administers to any other person any poison or other destructive with intent to injure shall be liable to imprisonment for three years.

There have been similar cases involving domestic workers who were jailed for the same offense in the past, Sing Pao reported.

In 2010, a 24-year-old Indonesian domestic worker added urine to a milk bottle for an infant and told the judge she did it due to superstition. She believed the newborn baby would like her after drinking the mixture. She was sentenced to four weeks in jail.

In another case in 2010, a 26-year-old Indonesian domestic worker poured urine into a water pot and let a four-year-old boy in her care drink the “water” when he took medicine. Again, the superstitious domestic worker said she believed this would make the boy listen to her and turn him into a good boy. The maid was jailed for nine months.