Three women, including a baby girl of a family, were seriously injured when some miscreants threw acid on them.
The incident took place at Kumraul village under Gaighat police station of Muzaffarpur district of north Bihar on Wednesday, just hours before the world celebrated International Women's Day.
The injured were identified as Kali (60), her daughter Sunaina Devi (30)and granddaughter Komal (2). All three were rushed to Sri Krishna medical college and hospital in Muzaffarpur.
Doctors attending to them said Kali's condition is critical.
"She has sustained nearly 50% burns," said a doctor.
Confirming the incident, deputy superintendent of police (east) Arvind Gupta an FIR has been lodged against Kali's co-villager Prem Thakur, on the basis of her statement.
Gupta said Kali used to work as a domestic help at Prem's house.
"She left the job after falling ill nearly six months ago. But Prem and his family members were pressurizing her to continue with her job," he explained.
The police officer said Prem had threatened her with dire consequences and even visited her to hand out the threats.
Sunaina said the incident took place when she had come from her in-laws house to her mother's residence on Wednesday evening.
"It was nearly 11.30pm that night, when my mother and daughter were sleeping in our hut, we woke up to a burning sensation and found Prem fleeing from the spot," she recalled.
"We raised an alarm but no body came to our rescue. Anyhow, we managed to reach SKMCH with the help of few of our well-wishers," she said.
Sunaina said the police reached the hospital only on Friday morning to record her statement.