The youth attacked the girl with a knife outside her residence in southwest Delhi's Palam Vihar area in full public view this evening, following which the accused identified as Lallan Khan has been arrested, police said.
Khan, a factory worker, knew the girl for the past three years and was a tenant in her house. He was recently asked to vacate the house after he allegedly started harassing the girl.
Khan was turned down by the girl everytime he proposed her.
After the incident, locals held the accused and thrashed him.
They called up the police and handed him over to them, following which he was arrested under attempt to murder and other charges.
The girl is admitted in a hospital and she is out of danger, police added.