Indian police launch murder investigation after a US woman was found screaming and chained to a tree in the middle of a forest

• A US woman was found chained to a tree in Maharashtra, India.
• Lalita Kayi, 50, said her husband had chained her to the tree and left her without food or water.
• Kayi is thought to have moved to India a decade ago to study yoga and meditation.

The case of a US woman who was discovered chained to a tree in a rural part of the western Indian state of Maharashtra is puzzling investigators.

Lalita Kayi, 50, was found last week in the state's Sindhudurg district after her screams were heard by a local, according to local media reports.

A cow herder who found Kayi told BBC Marathi that he had heard screams "coming from the forest on the side of the mountain" as he took his cattle to graze.

"When I went there, I saw that one of her legs was tied to a tree. She was screaming like an animal. I called other villagers and the local police," he said.

Police said the 50-year-old was found with a copy of her passport, an Indian ID card, a cellphone, a tablet, and 31,000 rupees (about $370), per the BBC.

The Indian Express reported that she also had a medical prescription with her.

She appeared emaciated and was reportedly taken to hospital and then on to a psychiatric facility to recover. Doctors said Kayi seemed to be experiencing a mental health condition.

Unnamed sources told India Today that after her rescue, Kayi provided police with a written statement in which she alleged that her husband had chained her to the tree and left her without food or water.

"Injection for extreme psychosis which caused a severely locked jaw and inability to drink any water. Need intravenous food. 40 days without food and water. Husband tied me to a tree in the forest and said I would die there," she wrote on a pad.

Police said it was unlikely she would have survived there for so long, however.

Sindhudurg police have since registered a case of attempted murder against Kayi's husband.

Details about Kayi's life are scant, and it remains unclear exactly how she ended up in the forest.

Police believe Kayi moved to India from the US around a decade ago to study yoga and meditation. She had previously lived in the state of Tamil Nadu in the south of the country, where authorities are now searching for her husband.

The Indian Express said that Kayi had recently fallen out with her husband and had been staying in Goa, a small neighboring state on India's southwestern coast.

Authorities are reportedly still searching for the husband.

A spokesperson for the US embassy in Delhi told the BBC that it would not respond to questions "due to the US Privacy Act."