New Delhi: Police Commissioner Amulya Patnaik from Delhi called for agitating police officers to return to their duties and posts after his colleagues today began a massive protest outside their headquarters. The officers were protesting violent clashes that broke out on Saturday at the Tis Hazari court complex in the city between cops and lawyers. In Saturday's clash, at least 20 police officers and eight lawyers were injured and 20 vehicles vandalized. "We must act as a disciplined force. It is our great responsibility that the government and the people expect us to uphold the law. I urge you to go back to duty, "said the top cop of Delhi,