Gurum, a Nepali, was spotted by a passerby outside the Patel Chowk Metro station in New Delhi area around 1.30 pm.
His neck was bleeding, said a police officer.
Police rushed him to the Ram Manohar Lohia Hospital.
The reason of the extreme step is yet to be ascertained.
Photos: Akshay Kumar, Taapsee Pannu promote 'Naam Shabana'
Flashback: When sexy models sizzled in bikinis at Tokyo fashion show
Photos: These Indian cities top the list in online purchase of sex products
In pictures: Indian-origin artistes in Hollywood
Photos: Varun Dhawan and Alia Bhatt at studio in Bandra