Mumbai police registered an FIR against 25 people, including Shiv Sena (UBT) leader Aaditya Thackeray and MNS leader Amit Thackeray, over an October protest at Shivaji Park alleging unlawful assembly and public order violations. Authorities invoked multiple Bharatiya Nyaya Sanhita sections. Protesters demanded release of detainees and raised concerns about alleged electoral irregularities and CEC Gyanesh Kumar's role.