Hundreds of migrant workers from Uttar Pradesh and Bihar have left north Gujarat after protests broke out over the rape of a 14-month-old girl -- allegedly by a man from Bihar. The worst of the violence, he said, took place in Mehsana and Sabarkantha, where the many of the troops have been stationed. "A part of Ahmedabad city was also affected. In these districts and Ahmedabad 42 cases have been registered," the police chief said.