A Saudi employer chopped off the right arm of an Indian domestic worker after she complained to police that the employer was mistreating her, the woman's sister said Friday.

Kasthuri Munirathinam, 58, was employed by a Saudi household in Riyadh three months ago, her sister S. Vijayakumari told CNN on the phone from the southern Indian state of Tamil Nadu.

Vijayakumari said the family was told about the attack on September 30.

According to Vijayakumari, Munirathinam's employer cut off her arm after she told local police that she was being mistreated, not being paid and not given enough food.

The Indian government has complained to Saudi Arabia about the incident.