A group of men brutally attacked a Sikh American, knocking off his turban and cutting his unshorn hair with a knife. The 41-year old Sikh-American IT specialist, Maan Singh Khalsa, was brutally attacked by some men, prompting a civil rights organisation to demand a hate crime investigation into the incident. was driving home on the night of September 25 when a group of men in car threw a beer can at his vehicle. Shouting that his hair be cut off, the men pulled his head out of the window, and cut a fistful of his hair with a knife, alleged Mr Khalsa. "Khalsa drove away from the scene but the men followed him and assaulted him through his open car window, knocking off his Sikh turban and hitting his face repeatedly," according to a statement from The Sikh Coalition, the nation's largest Sikh civil rights organisation. Mr Khalsa sustained injuries to his fingers, hands, eye and teeth. Sikh Coalition Legal Director, Harsimran Kaur urged authorities to fully investigate "this hateful attack" on Khalsa and his Sikh identity.