Delhi Police today filed a charge sheet before a city court under the stringent law UAPA and other sections against 20 persons including Umar Khalid for larger conspiracy in northeast Delhi riots in February. In its charge sheet running into 10,000 pages, the police have listed 747 witnesses and of them 51 have recorded their statements under CRPC 164 (before the magistrate). In the riots that had broken out in northeast Delhi on February 24 took the lives of 53 people and injured nearly 200.