A case has been filed against an unknown person for defacement with at least 55 advertisement posters about instant loans being pasted on doors and walls in three metro trains. The security guard, Vivek Koli, noticed the defacement and immediately informed the security control. The police have registered a case and are investigating the matter, seeking CCTV footage from the metro trains and the Saki Naka Metro Station where similar posters were found. The metro rail spokesperson confirmed the incident and stated that orders were issued to remove the posters immediately.