A man allegedly threw acid on a woman for turning down his marriage proposal at Sarakki in Bengaluru on Friday morning, the police said.
The 32-year-old woman, a divorcee with three children, sustained burns in her right eye and is under treatment in a private hospital, they said.
The accused Ahmed, aged 36, has been arrested.
The two were working in a factory producing incense products and had known each other for the past three years.
According to the police, Ahmed had been pestering the woman, also from his community, to marry him for the past many weeks.
She, however, repeatedly spurned his plea. On Friday he threw acid on her at Sarakki road junction near JP Nagar.
The incident comes on the heels of an acid attack on a woman in Bengaluru two months ago.
The accused was subsequently arrested from Tamil Nadu.