A 17-year-old boy studying in polytechnic allegedly committed suicide by hanging himself from a tree in Sankarankovil Railway Station premises in Tirunelveli district on Saturday, after hacking a girl for rejecting his advances, police said 

The student belonging to Puliampatti village had allegedly hanged himself to death after hacking a class XI girl and injuring her in the hand for "not responding to his love overtures", police said.

The girl was travelling in a mini bus to write her examination when she was hacked by the student.

He also threatened the passengers of the bus when they rushed to save the girl and nab him, and escaped.

The girl had been admitted to a government hospital.

The boy had earlier tried to strangulate the girl for rejecting his love and had attacked the girl's mother with a grinding stone. He was arrested then and let on bail only recently, police said.

The passengers told police that before hacking the girl, the student told her that she should not marry anybody, if she did not marry him, police said.