A Sikh professor at the Columbia University has been attacked and injured by a mob of up to 30 people who called him "Osama" and "terrorist" during a brutal assault which the police is investigating as a hate crime. School of International and Public Affairs professor Prabhjot Singh was assaulted on Saturday night while walking in the Harlem neighbourhood near New York, "There was a group of 25 to 30 young men. One of them said, 'Get him, Osama,'" 31-year-old Singh, who suffered a fractured jaw, was quoted as saying by the New York Daily News. "I got punched directly in the face about three times." Singh said he was on the ground being kicked when passersby intervened, saving him."I'm grateful to them," said Singh, who is married and has a young son. "It could have been a lot worse." Singh had returned from dinner, dropping his wife andone-year-old son at home before going for a walk.While being attacked, he saw one of the assailants put his arm inside his coat as if reaching for a gun. Singh was unable to provide any descriptions about his assailants to police. Singh told police that his assailants taunted him and beat him, calling him "Osama" and "terrorist" as they pulled at his long beard. "It's incredibly sad," Singh said. "It's not the neighbourhood I know. I work in this community. It's just not American. It's important that they are caught and be held responsible for what they did," he said. Singh reiterated that it was more crucial for people to understand that Sikhs are peaceful and should not be confused with radical Islamics.In a debate moderated by TIMES NOW's Editor-in-Chief Arnab Goswami, panelists -- Aryama Sundaram, Senior Advocate, Supreme Court; Ravi Batra, Senior Advocate, New York; Chidanand Rajghatta, Foreign Editor, TOI; Suhel Seth, Managing Partner Counselage and K C Singh, Former Secy, MEA -- discuss whether, should the Indian Govt officially take up increasing instances of racism against Indians and those of Indian descent?